CN109326721A - A kind of the perovskite solar battery and its liquid phase preparation process of high stability - Google Patents

A kind of the perovskite solar battery and its liquid phase preparation process of high stability Download PDF

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CN109326721A
CN109326721A CN201811189629.XA CN201811189629A CN109326721A CN 109326721 A CN109326721 A CN 109326721A CN 201811189629 A CN201811189629 A CN 201811189629A CN 109326721 A CN109326721 A CN 109326721A
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layer
perovskite
electron transfer
solar battery
insulating support
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CN109326721B (en
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孟哈日巴拉
刘会敬
付乌有
张波
王晓东
孙广
曹建亮
张战营
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Henan University of Technology
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10Deposition of organic active material
    • H10K71/12Deposition of organic active material using liquid deposition, e.g. spin coating
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/10Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising heterojunctions between organic semiconductors and inorganic semiconductors
    • H10K30/15Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2
    • H10K30/151Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2 the wide bandgap semiconductor comprising titanium oxide, e.g. TiO2
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/80Constructional details
    • H10K30/81Electrodes
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/80Constructional details
    • H10K30/81Electrodes
    • H10K30/82Transparent electrodes, e.g. indium tin oxide [ITO] electrodes
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/30Coordination compounds
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/549Organic PV cells

Abstract

The present invention provides the perovskite solar battery and its liquid phase preparation process of a kind of high stability, and solar battery includes: transparent conducting glass, electron transfer layer, mesoporous layer, insulating support layer, perovskite active layer and carbon electrode layer;The solar battery is to be prepared in natural air atmosphere using liquid phase method, prepares precursor liquid first, then using transparent conducting glass as substrate, is put into TiCl4It is calcined after aqueous solution processing, electron transfer layer is made, then as substrate, successively spin coating TiO2Slurry and ZrO2Slurry, in due course dry and heat treatment, is made mesoporous layer and insulating support layer;It instills precursor liquid in this substrate and heats and perovskite active layer is made, scratch conductive carbon paste on this substrate, so that the perovskite solar battery of high stability be made;Solar battery power conversion efficiency prepared by the present invention is high, and Long-Term Properties are stablized, and preparation process is simple, manufacturing cost is cheap, can satisfy large-scale industrialization production requirements.

Description

A kind of the perovskite solar battery and its liquid phase preparation process of high stability
Technical field
The present invention relates to technical field of solar batteries, and in particular to it is a kind of low cost, high power conversion efficiency based on The high stability perovskite solar battery and its simple liquid phase preparation process of carbon electrode.
Background technique
It enters after 21 century, as industry and rapid development of economy energy crisis have protruded and shown.Therefore, it develops Clean renewable energy is imperative.Pillar industry of the photovoltaic power generation as renewable energy of new generation, possesses cleaning, without dirt The advantages that contaminating, be low in cost.In recent years, the breakthrough of photovoltaic technology is created using perovskite as the novel solar battery of light-absorption layer Property progress.Since perovskite material absorptivity is high, band gap is controllable, bipolarity (can transmit electronics but also transporting holes), expands The advantages that scattered length is longer and carrier mobility is high, makes perovskite material possess preferable photoelectric properties, perovskite solar energy High power conversion efficiency may be implemented in battery.But power converts high perovskite solar battery in high-purity at present It is prepared in glove box, and using expensive hole transmission layer and noble metal electrode, the problems such as preparation cost is high, stability is poor is not Conducive to industrialization large-scale production.
Chinese patent CN105870335A discloses a kind of simple perovskite solar battery of preparation process, with mesoporous branch Based on frame structure devices, device architecture is simplified, the expensive noble metal electrode of carbon electrode replacement changes in certain degree It has been apt to the performance of perovskite solar battery.But mesoporous shelf layer and carbon electrode will successively pass through silk-screen printing, calcining preparation It after porous film electrode, is put into glove box, perovskite precursor liquid is added dropwise, after penetrating into mesoporous layer, solvent flashing, crystallization, Complete preparation.Later stage of preparation uses glove box, and preparation process is not all of to be completed under natural air.
Chinese patent CN106601833A disclose a kind of inexpensive high stability solar battery suitable for production and its Preparation method.Although perovskite solar battery power conversion efficiency has been more than 16% or more, vacuum thermal evaporation, spray are used The methods of apply, deposit, last vacuum evaporation metal electrode, there are device preparation cost height and preparation process condition to require high, behaviour Make the problems such as complicated.Although foregoing invention patent gradually constantly promotes perovskite solar battery to industrialization, calcium titanium Mine solar battery is to oxygen, moisture sensitivity, and defect is easier to be formed, and causes perovskite solar cell stability poor.It seeks Looking for stable perovskite preparation method of solar battery is the target of the field concerted effort.
Chinese patent CN106328813A discloses a kind of high stability and mixes caesium Ca-Ti ore type solar battery and its preparation Method.The patent application improves device stability by the doping of cation to a certain extent, but introduces expensive 2, 2', 7,7'- tetra- [N, N- bis- (4- methoxyphenyl) amino] -9,9'- spiral shell two fluorenes (Spiro-MeOTAD) base hole transmission layer.It causes It is high to make device cost, and stability is still very low.
It can be seen that its crystallinity and stabilization can be enhanced, while adjusting calcium by perovskite material cation doping Titanium ore material forbidden bandwidth, may finally improve perovskite solar battery power conversion efficiency and stability, therefore, for upper The deficiencies in the prior art are stated, the present invention provides one kind under natural air, the high stability perovskite sun based on carbon electrode It can battery and its simple liquid phase preparation process at low cost.
Summary of the invention
It is an object of the invention to overcome perovskite solar battery preparation aspect the deficiencies in the prior art, device is proposed Structure optimization does not use expensive material, using the perovskite of simple liquid phase method preparation high stability under the conditions of natural air The scheme of solar battery.Perovskite solar battery prepared by the present invention has power conversion efficiency high, in natural air item It is steady in a long-term under part, and the advantage that preparation process is simple and manufacturing cost is cheap, it can satisfy large-scale industrial metaplasia It produces and requires.
To achieve the goals above, the invention provides the following technical scheme:
A kind of perovskite solar battery of high stability, it is preferable that the perovskite solar battery includes: electrically conducting transparent Glass, electron transfer layer, mesoporous layer, insulating support layer, perovskite active layer and carbon electrode layer;
The perovskite active layer is mixed-cation perovskite.
Perovskite solar battery as described above, it is preferable that the perovskite active layer is prepared using a step spin-coating method Perovskite active layer, the perovskite active layer are mixed-cation perovskite (FA)x(MA)1-xPbI3, wherein x is the amount of substance Score;
Preferably, the mixed-cation perovskite (FA)x(MA)1-xPbI3In x be 0.05~0.45;
More preferably, the mixed-cation perovskite (FA)x(MA)1-xPbI3Including first narrow cation and methylamine sun from Son;
More preferably, the perovskite active layer infiltration is filled into mesoporous layer and insulating support layer, and covers insulation branch The surface of rack-layer;
More preferably, the perovskite active layer with a thickness of 300~700nm.
Perovskite solar battery as described above, it is preferable that the transparent conducting glass is FTO electro-conductive glass;The electricity Sub- transport layer is nano-TiO2Layer;The mesoporous layer is mesoporous TiO2Layer;The insulating support layer is porous ZrO2Layer;The carbon Electrode layer is hydrophobicity carbon electrode.
Perovskite solar battery as described above, it is preferable that the electron transfer layer with a thickness of 10~40nm;It is given an account of Aperture layer with a thickness of 150~300nm;The insulating support layer with a thickness of 150~300nm;The carbon electrode layer with a thickness of 8 ~20 μm.
The liquid phase preparation process of described in any item perovskite solar batteries as above, it is preferable that the liquid phase preparation process It is that all preparation process are completed using the liquid phase method of spin coating and blade coating in natural air atmosphere;The liquid phase preparation process packet Include following steps:
1) mixed-cation perovskite precursor liquid is prepared
Mixed-cation perovskite (FA) is prepared according to the amount score of certain substancex(MA)1-xPbI3Precursor liquid, it is standby With;
2) transparent conducting glass/electron transfer layer membrane electrode preparation
FTO electro-conductive glass is put into TiCl after ultrasonic cleaning and drying4Aqueous solution processing, is then placed on warm table and forges It burns, forms TiO2Electron transfer layer, to obtain transparent conducting glass/electron transfer layer membrane electrode;
3) transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode preparation
The spin coating TiO on transparent conducting glass/electron transfer layer membrane electrode of step 2) preparation2Slurry is put after dry It is placed on warm table after Low Temperature Heat Treatment, cooled to room temperature, then spin coating ZrO2Slurry is placed on warm table after dry After calcining, cooled to room temperature, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electricity Pole;
4) transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode system It is standby
Transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode prepared by step 3) is placed in and is added After being preheated in thermal station, it is added dropwise mixed-cation perovskite (FA)x(MA)1-xPbI3Precursor liquid is placed on warm table, is heated and is protected Warm crystallization, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer thin-film electro Pole;
5) perovskite solar battery is obtained
In transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer of step 4) preparation After scratching conductive carbon paste on membrane electrode, solidification prepares carbon electrode, to obtain stable perovskite solar battery.
Liquid phase preparation process as described above, it is preferable that in step 1), the mixed-cation perovskite (FA)x(MA)1- xPbI3The preparation process of precursor liquid includes:
Lead iodide and iodate methylamine are put into anhydrous n,N-Dimethylformamide, ultrasound makes it completely dissolved, and obtains MAPbI3DMF solution;Lead iodide and iodate carbonamidine are put into anhydrous n,N-Dimethylformamide, ultrasound keeps it completely molten Solution obtains FAPbI3DMF solution;
By MAPbI3DMF solution and FAPbI3DMF solution mixed according to the amount score of certain substance, obtain Mixed-cation perovskite (FA)x(MA)1-xPbI3Precursor liquid, wherein x is the amount score of substance, and x is 0.05~0.45.
Liquid phase preparation process as described above, it is preferable that in step 2), by FTO electro-conductive glass after ultrasonic cleaning and drying It is put into the TiCl that concentration is 0.03~0.10mol/L450~80 DEG C of 20~50min of processing of aqueous solution, then spend respectively again from After sub- water and washes of absolute alcohol, it is placed in 10~40min of calcining on 400~500 DEG C of warm tables, forms nano-TiO2Electron-transport Layer, to obtain transparent conducting glass/electron transfer layer membrane electrode.
Liquid phase preparation process as described above, it is preferable that in step 3), in transparent conducting glass/electron transfer layer thin-film electro Extremely upper spin coating TiO2Slurry after dry, be placed in after being heat-treated 8~12min on 150~250 DEG C of warm tables, naturally cool to room Temperature;Spin coating ZrO again2Slurry after dry, be placed in after being heat-treated 25~35min on 450~600 DEG C of warm tables, naturally cool to Room temperature, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode.
Liquid phase preparation process as described above, it is preferable that in step 4), by transparent conducting glass/electron transfer layer of preparation/ Mesoporous layer/insulating support layer film electrode is placed on warm table after preheating, is added dropwise mixed-cation perovskite (FA)x(MA)1- xPbI3Precursor liquid carries out spin coating, is placed on 80~110 DEG C of warm tables, heats and keep the temperature 10~70min of crystallization, mixed-cation Perovskite (FA)x(MA)1-xPbI3Precursor liquid crystallizes on the gap and surface of mesoporous layer and insulating support layer, to obtain transparent Electro-conductive glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode.
Liquid phase preparation process as described above, it is preferable that in step 5),
It is scraped on transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode After applying conductive carbon paste, in 90~110 DEG C of 5~30min of solidification, hydrophobicity carbon electrode is formed, to obtain the perovskite of high stable Solar battery.
Compared with the immediate prior art, technical solution provided by the invention is had the following beneficial effects:
(1) power conversion efficiency of perovskite solar battery provided by the invention is high, the sun prepared under optimal conditions AM1.5G standard sunlight (intensity 100mW/cm of the energy battery in solar simulator2) irradiate lower measured power transfer efficiency Up to 9.5% or more.
(2) perovskite solar battery provided by the invention has many advantages, such as moisture resistance by force and stablizes high.
(3) the perovskite solar battery technology scheme provided by the invention for preparing is under the conditions of natural air using liquid phase Method preparation, does not need glove box, and do not need other special safeguard measures, has the features such as simple process, easy to operate.
(4) do not include expensive hole transmission layer in perovskite solar battery prepared by the present invention, and be not related to true Sky vapor deposition noble metal electrode process, considerably reduces cost.
(5) technical solution provided by the invention selects carbon electrode instead of metal when preparing perovskite solar battery Electrode.Carbon electrode has hydrophobicity, when perovskite solar battery works under field conditions (factors), improves device moisture resistance, makes it Long-term stable operation, in particular to: the active layer that the present invention uses narrows (HC (NH for first2)2 +, FA+) and methylamine (CH3NH3 +, MA+) The perovskite (FA) of cation mixingx(MA)1-xPbI3, select mixed-cation steady so as to improve the material of perovskite active layer It is qualitative;Hydrophobicity carbon electrode resists erosion of the vapor to solar battery, further improves the stability of device.In high humidity Attenuation test in degree air shows that solar battery power conversion efficiency has still maintained initial value after 2 months 90% or more, it is demonstrated by out long-time stability.
Detailed description of the invention
Fig. 1 is high stability perovskite solar battery structure figure provided by the invention;
Fig. 2 is the J-V indicatrix test chart of perovskite solar battery prepared by embodiment 1 in the present invention;
Fig. 3 is the carbon electrodes and water droplet contact angle of perovskite solar battery prepared by embodiment 1 in the present invention Test chart;
Fig. 4 is the stability test figure of perovskite solar battery prepared by embodiment 1 in the present invention;
In figure: 1, transparent conducting glass;11, glass;12, FTO layers;3, electron transfer layer;4, mesoporous layer;5, insulating support Layer;6, perovskite active layer;7, carbon electrode layer.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general Logical technical staff's every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted Under condition, the feature in embodiment and embodiment in the present invention be can be combined with each other.
The perovskite solar battery and its liquid phase preparation process of a kind of high stability are provided in the present invention.The calcium titanium Mine solar battery includes: transparent conducting glass 1, electron transfer layer 3, mesoporous layer 4, insulating support layer 5, perovskite active layer 6 With carbon electrode layer 7;Wherein, perovskite active layer 6 is mixed-cation perovskite.
Perovskite active layer 6 is to prepare perovskite active layer using the spin-coating method of a step, which is mixing Cationic perovskite (FA)x(MA)1-xPbI3, wherein x be substance amount score, x be 0.05~0.45 (such as 0.06,0.08, 0.10、0.13、0.16、0.19、0.22、0.25、0.28、0.31、0.34、0.37、0.40、0.42、0.44)。
It is further preferred that mixed-cation perovskite (FA)x(MA)1-xPbI3It is that iodate first narrows (HC (NH2)2I, FAI) With iodate methylamine (CH3NH3, MAI) and it is raw material preparation.
In a specific embodiment of the present invention, the infiltration of perovskite active layer 6 is filled into mesoporous layer 4 and insulating support layer 5, And cover the surface of insulating support layer 5.
In a specific embodiment of the present invention, transparent conducting glass 1 is Fluorin doped stannic oxide (FTO) electro-conductive glass, i.e., FTO electro-conductive glass is in the upper surface of glass 11 to have one layer of FTO layer 12, immediately referred to as FTO electro-conductive glass;Electron transfer layer 3 is to receive Rice TiO2Layer;Mesoporous layer 4 is mesoporous TiO2Layer;Insulating support layer 5 is porous ZrO2Layer;Carbon electrode layer 7 is hydrophobicity carbon electrode.
It is further preferred that electron transfer layer 3 with a thickness of 10~40nm (such as 12nm, 14nm, 16nm, 8nm, 20nm, 22nm,24nm,26nm,8nm,30nm,32nm,34nm,36nm,8nm,39nm);Mesoporous layer 4 with a thickness of 150~300nm (example As 152nm, 157nm, 160nm, 165nm, 170nm, 175nm, 80nm, 185nm, 190nm, 195nm, 200nm, 205nm, 210nm、215nm、220nm、225nm、230nm、235nm、240nm、248nm、256nm、262nm、268nm、275nm、 283nm,290nm,295nm,298nm);Insulating support layer 5 with a thickness of 150~300nm (such as 152nm, 157nm, 160nm, 165nm、170nm、175nm、80nm、185nm、190nm、195nm、200nm、205nm、210nm、215nm、220nm、225nm、 230nm,235nm,240nm,248nm,256nm,262nm,268nm,275nm,283nm,290nm,295nm,298nm);Carbon electricity Pole layer 7 with a thickness of 8~20 μm of (such as 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μ m);Perovskite active layer 6 with a thickness of 300~700nm (such as 330nm, 370nm, 400nm, 450nm, 490nm, 530nm, 570nm、610nm、650nm、690nm)。
More preferably, insulating support layer 5 with a thickness of 200~300nm (such as 210nm, 220nm, 230nm, 240nm, 250nm、260nm、270nm、280nm、290nm)。
For the clearer structure composition for illustrating perovskite solar battery in the specific embodiment of the invention, the present invention is also A kind of liquid phase preparation process of perovskite solar battery is provided, which used in natural air atmosphere The liquid phase method of spin coating and blade coating completes all preparation process.The liquid phase preparation process includes the following steps:
1) mixed-cation perovskite precursor liquid is prepared
Mixed-cation perovskite (FA) is prepared according to the amount score of certain substancex(MA)1-xPbI3Precursor liquid, it is standby With;
2) transparent conducting glass/electron transfer layer membrane electrode preparation
FTO electro-conductive glass is put into TiCl after ultrasonic cleaning and drying4Aqueous solution processing, is then placed on warm table and forges It burns, forms TiO2Electron transfer layer, to obtain transparent conducting glass/electron transfer layer membrane electrode;
3) transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode preparation
The spin coating TiO on transparent conducting glass/electron transfer layer membrane electrode of step 2) preparation2Slurry is put after dry It is placed on warm table after Low Temperature Heat Treatment, cooled to room temperature;Spin coating ZrO again2Slurry is placed on warm table after dry After forged is burnt, cooled to room temperature, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film Electrode;
4) transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode system It is standby
Transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode prepared by step 3) is placed in and is added After being preheated in thermal station, it is added dropwise mixed-cation perovskite (FA)x(MA)1-xPbI3Precursor liquid is placed on warm table, is heated and is protected Warm crystallization, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer thin-film electro Pole;
5) perovskite solar battery is obtained
In transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer of step 4) preparation After scratching conductive carbon paste on membrane electrode, solidification prepares carbon electrode, to obtain stable perovskite solar battery.
In a specific embodiment of the present invention, in step 1), mixed-cation perovskite (FA)x(MA)1-xPbI3Precursor liquid Preparation process include:
Lead iodide (the PbI for being 1:1 by molar ratio2) and iodate methylamine (AMI) be put into anhydrous N,N-dimethylformamide (DMF) in, ultrasound is made it completely dissolved, and obtains MAPbI3DMF solution;Lead iodide (the PbI for being 1:1 by molar ratio2) and iodate Carbonamidine (FMI) is put into anhydrous n,N-Dimethylformamide (DMF), and ultrasound makes it completely dissolved, and obtains FAPbI3DMF it is molten Liquid;
By MAPbI3DMF solution and FAPbI3DMF solution mixed according to the amount score of certain substance, obtain Mixed-cation perovskite (FA)x(MA)1-xPbI3Precursor liquid, wherein x be substance amount score, x be 0.05~0.45 (such as 0.06、0.08、0.10、0.13、0.16、0.19、0.22、0.25、0.28、0.31、0.34、0.37、0.40、0.42、0.44)。
In a specific embodiment of the present invention, in step 2), FTO electro-conductive glass is put into after ultrasonic cleaning and drying dense Degree be 0.03~0.10mol/L (such as 0.035mol/L, 0.04mol/L, 0.045mol/L, 0.05mol/L, 0.055mol/L, 0.06mol/L、0.065mol/L、0.07mol/L、0.075mol/L、0.08mol/L、0.085mol/L、0.09mol/L、 TiCl 0.095mol/L)450~80 DEG C of aqueous solution (such as 53 DEG C, 55 DEG C, 58 DEG C, 60 DEG C, 62 DEG C, 65 DEG C, 68 DEG C, 70 DEG C, 73 DEG C, 75 DEG C, 78 DEG C) processing 20~50min (such as 22min, 25min, 28min, 30min, 32min, 35min, 38min, 40min, 42min, 45min, 48min), after then being cleaned respectively with deionized water and washes of absolute alcohol again, it is placed in 400~ 500 DEG C (such as 410 DEG C, 420 DEG C, 430 DEG C, 440 DEG C, 450 DEG C, 460 DEG C, 470 DEG C, 480 DEG C, 485 DEG C, 490 DEG C, 495 DEG C) On warm table calcine 10~40min (such as 12min, 15min, 18min, 20min, 22min, 25min, 28min, 30min, 32min, 35min, 38min), form nano-TiO2Electron transfer layer, to obtain transparent conducting glass/electron-transport layer film Electrode;
Preferably, after FTO electro-conductive glass is successively cleaned with tap water, distilled water, acetone and EtOH Sonicate containing dish washing liquid It dries up again.
In a specific embodiment of the present invention, it in step 3), is revolved on transparent conducting glass/electron transfer layer membrane electrode Apply TiO2Slurry, after dry, be placed in 150~250 DEG C (such as 155 DEG C, 160 DEG C, 165 DEG C, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 190 DEG C, 195 DEG C, 200 DEG C, 205 DEG C, 210 DEG C, 215 DEG C, 220 DEG C, 225 DEG C, 230 DEG C, 235 DEG C, 240 DEG C) heating On platform be heat-treated 8~12min (such as 9min, 9.2min, 9.5min, 9.8min, 10min, 10.2min, 10.5min, 10.8min, 11min, 11.2min, 11.5min, 11.8min) after, cooled to room temperature;Spin coating ZrO again2Slurry, it is dry Afterwards, it is placed on 450~600 DEG C of (such as 470 DEG C, 490 DEG C, 510 DEG C, 530 DEG C, 550 DEG C, 570 DEG C, 590 DEG C) warm tables hot After handling 25~35min (such as 26min, 27min, 28min, 29min, 30min, 31min, 32min, 33min, 34min), from It is so cooled to room temperature, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode.
More preferably, spin coating TiO2Slurry and spin coating ZrO2The speed of rotation of slurry be 3500~4500rpm (such as 3600rpm, 3700rpm, 3800rpm, 3900rpm, 4000rpm, 4100rpm, 4200rpm, 4300rpm, 4400rpm), spin coating Time is 25~35s (such as 26s, 27s, 28s, 29s, 30s, 31s, 32s, 33s, 34s).
In a specific embodiment of the present invention, the spin coating TiO in step 3)2Mesoporous knot directly can not be just formed after slurry Structure, this is because in spin coating TiO2Using Low Temperature Heat Treatment mode when slurry, Low Temperature Heat Treatment cannot completely remove bonding The organic matters such as agent, also just do not form meso-hole structure also.It must be in spin coating TiO2Spin coating ZrO again after Low Temperature Heat Treatment after slurry2Slurry Material, and high-temperature heat treatment is carried out, TiO can be thus obtained simultaneously2Meso-hole structure and ZrO2Structure (insulating support layer is mesoporous).
In a specific embodiment of the present invention, in step 4), by transparent conducting glass/electron transfer layer of preparation/mesoporous Layer/insulating support layer film electrode is placed on warm table after preheating, is added dropwise mixed-cation perovskite (FA)x(MA)1-xPbI3Before Liquid spin coating is driven, is (FA) of the spin coating with n,N-Dimethylformamide (DMF) for solvent on insulating support layerx(MA)1-xPbI3 Precursor liquid;Be placed in after spin coating 80~110 DEG C (such as 82 DEG C, 85 DEG C, 90 DEG C, 92 DEG C, 95 DEG C, 98 DEG C, 100 DEG C, 102 DEG C, 105 DEG C, 108 DEG C) on warm table, heat and keep the temperature 10~70min of crystallization (such as 12min, 15min, 20min, 25min, 30min, 35min, 40min, 45min, 50min, 55min, 60min, 65min, 68min), solute is in mesoporous layer and insulating support It is crystallized on the gap and surface of layer, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite Active layer membrane electrode.
Preferably, transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode is placed on warm table Preheating time is 7~15min (such as 8min, 9min, 10min, 11min, 12min, 13min, 14min), the mixing sun of dropwise addition Ion perovskite (FA)x(MA)1-xPbI3The temperature of precursor liquid be 45~75 DEG C (such as 46 DEG C, 48 DEG C, 50 DEG C, 52 DEG C, 54 DEG C, 56℃,58℃,61℃,64℃,66℃,69℃,71℃,73℃,74℃);
More preferably, mixed-cation perovskite (FA) is added dropwisex(MA)1-xPbI3First with the speed of rotation when precursor liquid spin coating 1700~1900rpm (such as 1710rpm, 1730rpm, 1750rpm, 1780rpm, 1800rpm, 1820rpm, 1840rpm, 1860rpm, 1880rpm, 1890rpm) 2~4s of spin coating (such as 2s, 2.2s, 2.4s, 2.5s, 2.7s, 2.9s, 3.0s, 3.2s, 3.5s, 3.8s, 3.9s, 4.0s), then again with 3500~3800rpm of the speed of rotation (such as 3510rpm, 3550rpm, 3580rpm, 3600rpm, 3630rpm, 3660rpm, 3690rpm, 3730rpm, 3760rpm, 3780rpm, 3790rpm) spin coating 25~35s (such as 26s, 27s, 28s, 29s, 30s, 31s, 32s, 33s, 34s).
In a specific embodiment of the present invention, in step 5), in transparent conducting glass/electron transfer layer/mesoporous layer/insulation After scratching conductive carbon paste on shelf layer/perovskite active layer membrane electrode, in 90~110 DEG C of (such as 91 DEG C, 93 DEG C, 95 DEG C, 97 DEG C, 99 DEG C, 101 DEG C, 103 DEG C, 105 DEG C, 107 DEG C, 109 DEG C) solidification 5~30min (such as 6min, 8min, 10min, 12min, 14min, 16min, 18min, 20min, 22min, 25min, 28min, 29min), hydrophobicity carbon electrode is formed, to obtain height Stable perovskite solar battery.
Hole transmission layer is not used in the device architecture of the perovskite solar battery of high stability provided by the invention, no Use noble metal electrode.The perovskite solar battery is to improve the moisture resistance of device to electrode with hydrophobicity carbon electrode.
To sum up, the present invention provides the perovskite solar batteries and its simple preparation method of a kind of high stability. The solar battery is by transparent conducting glass, electron transfer layer, mesoporous layer, insulating support layer, perovskite active layer and carbon electrode Layer composition, preparation process do not have to glove box, carry out in natural air atmosphere.Active layer is that first narrows (HC (NH2)2 +, FA+) and first Amine (CH3NH3 +, MA+) cation mixing perovskite (FA)x(MA)1-xPbI3.Mixed-cation is selected, it is living to improve perovskite The stability of material of property layer;Hydrophobicity carbon electrode resists erosion of the vapor to solar battery, further improves device Stability.Attenuation test in damp atmosphere shows that solar battery power conversion efficiency still maintains after 2 months 90% or more of initial value, is demonstrated by out long-time stability.High-cost hole transmission layer and your gold are abandoned in device architecture Belong to electrode, selects the carbon electrode of low-temperature setting, significantly simplify preparation process, save the cost makes perovskite solar battery Convenient for being mass produced and applying.
Embodiment 1
Under the conditions of natural air, using the perovskite solar battery of simple liquid phase method preparation high stability, specifically Steps are as follows:
(1) lead iodide (PbI of 0.9353g is weighed2) and the iodate methylamine (AMI) of 0.3228g be put into the anhydrous N, N- of 2mL In dimethylformamide (DMF), ultrasound is made it completely dissolved, and obtains MAPbI3DMF solution;Weigh 0.9167 PbI2With The iodate carbonamidine (FMI) of 0.3420g is put into the anhydrous DMF of 2mL, and ultrasound makes it completely dissolved, and obtains FAPbI3DMF solution. Above two perovskite solution is mixed by x=0.3, is obtained mixed-cation perovskite (FA)0.3(MA)0.7PbI3Forerunner Liquid, it is spare.
(2) FTO electro-conductive glass is blown successively with the tap water containing dish washing liquid, distilled water, acetone and EtOH Sonicate cleaning It is dry.Then above-mentioned substrate is put into the TiCl that concentration is 0.08mol/L4In aqueous solution, after keeping the temperature 40min under the conditions of 70 DEG C, take Out, it is rinsed respectively with distilled water and ethyl alcohol, drying is placed on warm table, is heated to 450 DEG C, is heat-treated 30min, nanometer TiO2Form electron transfer layer.
(3) spin coating nano-TiO on above-mentioned substrate2Slurry, speed of rotation 3800rpm, spin-coating time 30s, Zhi Hou 200 DEG C of heat treatment 10min, cooled to room temperature, then spin coating nanometer ZrO on warm table2Slurry, speed of rotation 4200rpm, Spin-coating time is 30s, is finally placed on warm table and is heated to 500 DEG C, is heat-treated 30min, and cooled to room temperature forms and is situated between Hole TiO2Layer and porous ZrO2Insulating support layer.
(4) after above-mentioned substrate preheats 10min on warm table, 50 DEG C of mixed-cation perovskite (FA) is added dropwise0.3 (MA)0.7PbI3Precursor liquid spin coating, after the rate spin coating 3s of 1800rpm, with the rate spin coating 30s of 3600rpm, later base Piece is placed on 100 DEG C of warm table, is heated 50min, so that solvent is volatilized, solute is in mesoporous TiO2Layer and porous ZrO2Insulation branch It is crystallized on the gap and surface of rack-layer, forms perovskite active layer.
(5) finally, scratching conductive carbon paste on above-mentioned substrate, 100 DEG C of solidification 15min form carbon electrode, and natural cooling obtains To high stability perovskite solar battery as shown in Figure 1.
By perovskite solar battery manufactured in the present embodiment solar simulator AM1.5G standard sunlight (intensity For 100mW/cm2) lower test Current density-voltage (J-V) indicatrix is irradiated, test result is indicated with Fig. 2.The solar-electricity Pond obtained short-circuit current density (Jsc) it is 21.58mA/cm2, open-circuit voltage (V) it is 0.982V, fill factor (FF) is 0.452, And power conversion efficiency (PCE) is 9.58%.
Contact angle, result are tested by water droplet is added dropwise in perovskite solar battery carbon electrodes manufactured in the present embodiment Indicate that (figure when water droplet is added dropwise in the carbon electrodes of solar battery and is tested is black-and-white photograph figure, other are black using Fig. 3 White line figure cannot show the test effect, therefore providing here is black-and-white photograph figure).The result shows that water is at this At spherical shape in carbon electrodes, extension drop shape at any time is constant, dimensionally stable, and the contact angle of carbon electrode and water is 123 °, show that the hydrophobicity of carbon electrode is high, moisture is unable to penetration carbon electrode layer, protects perovskite active layer well.
Perovskite solar battery manufactured in the present embodiment is not taken into any safeguard measure, is stored under field conditions (factors), Every 1 week, in AM1.5G standard sunlight (the intensity 100mW/cm of solar simulator2) the lower test J-V spy of irradiation Curve is levied, power conversion efficiency is had rated and changes with time relationship, as a result indicated with Fig. 4.The result shows that the solar battery It stores under field conditions (factors), with the extension power conversion efficiency slow-decay of time, but rate of decay is especially slow, by 2 After month, power conversion efficiency has still maintained 90% of initial value or more, demonstrates the perovskite sun of straightforward procedure preparation Energy battery has very high stability.
Embodiment 2
Under the conditions of natural air, using the perovskite solar battery of simple liquid phase method preparation high stability, specifically Steps are as follows:
(1) PbI of 0.9353g is weighed2It is put into the AMI of 0.3228g in the DMF of anhydrous 2mL, ultrasound keeps it completely molten Solution obtains perovskite MAPbI3Precursor liquid, it is spare.
(2) FTO electro-conductive glass is blown successively with the tap water containing dish washing liquid, distilled water, acetone and EtOH Sonicate cleaning It is dry.Then above-mentioned substrate is put into the TiCl that concentration is 0.08mol/L4In aqueous solution, after keeping the temperature 40min under the conditions of 70 DEG C, take Out, it is rinsed respectively with distilled water and ethyl alcohol, drying is placed on warm table, is heated to 450 DEG C, is heat-treated 30min, nanometer TiO2Form electron transfer layer.
(3) spin coating nano-TiO on above-mentioned substrate2Slurry, speed of rotation 3800rpm, spin-coating time 30s, Zhi Hou 200 DEG C of heat treatment 10min, cooled to room temperature, then spin coating nanometer ZrO on warm table2Slurry, speed of rotation 4200rpm, Spin-coating time is 30s, is finally placed on warm table and is heated to 500 DEG C, is heat-treated 30min, and cooled to room temperature forms and is situated between Hole TiO2Layer and porous ZrO2Insulating support layer.
(4) after above-mentioned substrate preheats 10min on warm table, 50 DEG C of perovskite MAPbI is added dropwise3Precursor liquid spin coating, with After the rate spin coating 3s of 1800rpm, with the rate spin coating 30s of 3600rpm, substrate is placed on later on 100 DEG C of warm table, 40min is heated, so that solvent is volatilized, solute is in mesoporous TiO2Layer and porous ZrO2It is crystallized on the gap and surface of insulating support layer, Form perovskite active layer.
(5) finally, scratching conductive carbon paste on above-mentioned substrate, 100 DEG C of solidification 15min form carbon electrode, and natural cooling obtains To high stability perovskite solar battery.
By perovskite solar battery manufactured in the present embodiment solar simulator AM1.5G standard sunlight (intensity For 100mW/cm2) the lower test J-V indicatrix of irradiation, the short-circuit current density of the solar battery is 18.92mA/cm2, open circuit Voltage is 0.928V, and fill factor 0.453 and power conversion efficiency are 7.95%;Other performance tests and 1 phase of embodiment Together.
Embodiment 3
Under the conditions of natural air, using the perovskite solar battery of simple liquid phase method preparation high stability, specifically Steps are as follows:
(1) lead iodide (PbI of 0.9353g is weighed2) and the iodate methylamine (AMI) of 0.3228g be put into the anhydrous N, N- of 2mL In dimethylformamide (DMF), ultrasound is made it completely dissolved, and obtains MAPbI3DMF solution;Weigh 0.9167 PbI2With The iodate carbonamidine (FMI) of 0.3420g is put into the anhydrous DMF of 2mL, and ultrasound makes it completely dissolved, and obtains FAPbI3DMF solution. Above two perovskite solution is mixed by x=0.1, is obtained mixed-cation perovskite (FA)0.1(MA)0.9PbI3Forerunner Liquid, it is spare.
(2) FTO electro-conductive glass is blown successively with the tap water containing dish washing liquid, distilled water, acetone and EtOH Sonicate cleaning It is dry.Then above-mentioned substrate is put into the TiCl that concentration is 0.08mol/L4In aqueous solution, after keeping the temperature 40min under the conditions of 70 DEG C, take Out, it is rinsed respectively with distilled water and ethyl alcohol, drying is placed on warm table, is heated to 450 DEG C, is heat-treated 30min, nanometer TiO2Form electron transfer layer.
(3) spin coating nano-TiO on above-mentioned substrate2Slurry, speed of rotation 3800rpm, spin-coating time 30s, Zhi Hou 200 DEG C of heat treatment 10min, cooled to room temperature, then spin coating nanometer ZrO on warm table2Slurry, speed of rotation 4200rpm, Spin-coating time is 30s, is finally placed on warm table and is heated to 500 DEG C, is heat-treated 30min, and cooled to room temperature forms and is situated between Hole TiO2Layer and porous ZrO2Insulating support layer.
(4) after above-mentioned substrate preheats 10min on warm table, 50 DEG C of mixed-cation perovskite (FA) is added dropwise0.1 (MA)0.9PbI3Precursor liquid spin coating, after the rate spin coating 3s of 1800rpm, with the rate spin coating 30s of 3600rpm, later base Piece is placed on 100 DEG C of warm table, is heated 50min, so that solvent is volatilized, solute is in mesoporous TiO2Layer and porous ZrO2Insulation branch It is crystallized on the gap and surface of rack-layer, forms perovskite active layer.
(5) finally, scratching conductive carbon paste on above-mentioned substrate, 100 DEG C of solidification 15min form carbon electrode, and natural cooling obtains To high stability perovskite solar battery.
By perovskite solar battery manufactured in the present embodiment solar simulator AM1.5G standard sunlight (intensity For 100mW/cm2) the lower test J-V indicatrix of irradiation, the short-circuit current density of the solar battery is 17.32mA/cm2, open circuit Voltage is 0.910V, and fill factor 0.452 and power conversion efficiency are 7.12%;Other performance tests and 1 phase of embodiment Together.
Embodiment 4
Under the conditions of natural air, using the perovskite solar battery of simple liquid phase method preparation high stability, specifically Steps are as follows:
(1) lead iodide (PbI of 0.9353g is weighed2) and the iodate methylamine (AMI) of 0.3228g be put into the anhydrous N, N- of 2mL In dimethylformamide (DMF), ultrasound is made it completely dissolved, and obtains MAPbI3DMF solution;Weigh 0.9167 PbI2With The iodate carbonamidine (FMI) of 0.3420g is put into the anhydrous DMF of 2mL, and ultrasound makes it completely dissolved, and obtains FAPbI3DMF solution. Above two perovskite solution is mixed by x=0.2, is obtained mixed-cation perovskite (FA)0.2(MA)0.8PbI3Forerunner Liquid, it is spare.
(2) FTO electro-conductive glass is blown successively with the tap water containing dish washing liquid, distilled water, acetone and EtOH Sonicate cleaning It is dry.Then above-mentioned substrate is put into the TiCl that concentration is 0.08mol/L4In aqueous solution, after keeping the temperature 40min under the conditions of 70 DEG C, take Out, it is rinsed respectively with distilled water and ethyl alcohol, drying is placed on warm table, is heated to 450 DEG C, is heat-treated 30min, nanometer TiO2Form electron transfer layer.
(3) spin coating nano-TiO on above-mentioned substrate2Slurry, speed of rotation 3800rpm, spin-coating time 30s, Zhi Hou 200 DEG C of heat treatment 10min, cooled to room temperature, then spin coating nanometer ZrO on warm table2Slurry, speed of rotation 4200rpm, Spin-coating time is 30s, is finally placed on warm table and is heated to 500 DEG C, is heat-treated 30min, and cooled to room temperature forms and is situated between Hole TiO2Layer and porous ZrO2Insulating support layer.
(4) after above-mentioned substrate preheats 10min on warm table, 50 DEG C of mixed-cation perovskite (FA) is added dropwise0.2 (MA)0.8PbI3Precursor liquid spin coating, after the rate spin coating 3s of 1800rpm, with the rate spin coating 30s of 3600rpm, later base Piece is placed on 100 DEG C of warm table, is heated 50min, so that solvent is volatilized, solute is in mesoporous TiO2Layer and porous ZrO2Insulation branch It is crystallized on the gap and surface of rack-layer, forms perovskite active layer.
(5) finally, scratching conductive carbon paste on above-mentioned substrate, 100 DEG C of solidification 15min form carbon electrode, and natural cooling obtains To high stability perovskite solar battery.
By perovskite solar battery manufactured in the present embodiment solar simulator AM1.5G standard sunlight (intensity For 100mW/cm2) the lower test J-V indicatrix of irradiation, the short-circuit current density of the solar battery is 19.92mA/cm2, open circuit Voltage is 0.933V, and fill factor 0.462 and power conversion efficiency are 8.59%;Other performance tests and 1 phase of embodiment Together.
Embodiment 5
Under the conditions of natural air, using the perovskite solar battery of simple liquid phase method preparation high stability, specifically Steps are as follows:
(1) lead iodide (PbI of 0.9353g is weighed2) and the iodate methylamine (AMI) of 0.3228g be put into the anhydrous N, N- of 2mL In dimethylformamide (DMF), ultrasound is made it completely dissolved, and obtains MAPbI3DMF solution;Weigh 0.9167 PbI2With The iodate carbonamidine (FMI) of 0.3420g is put into the anhydrous DMF of 2mL, and ultrasound makes it completely dissolved, and obtains FAPbI3DMF solution. Above two perovskite solution is mixed by x=0.4, is obtained mixed-cation perovskite (FA)0.4(MA)0.6PbI3Forerunner Liquid, it is spare.
(2) FTO electro-conductive glass is blown successively with the tap water containing dish washing liquid, distilled water, acetone and EtOH Sonicate cleaning It is dry.Then above-mentioned substrate is put into the TiCl that concentration is 0.08mol/L4In aqueous solution, after keeping the temperature 40min under the conditions of 70 DEG C, take Out, it is rinsed respectively with distilled water and ethyl alcohol, drying is placed on warm table, is heated to 450 DEG C, is heat-treated 30min, nanometer TiO2Form electron transfer layer.
(3) spin coating nano-TiO on above-mentioned substrate2Slurry, speed of rotation 3800rpm, spin-coating time 30s, Zhi Hou 200 DEG C of heat treatment 10min, cooled to room temperature, then spin coating nanometer ZrO on warm table2Slurry, speed of rotation 4200rpm, Spin-coating time is 30s, is finally placed on warm table and is heated to 500 DEG C, is heat-treated 30min, and cooled to room temperature forms and is situated between Hole TiO2Layer and porous ZrO2Insulating support layer.
(4) after above-mentioned substrate preheats 10min on warm table, 50 DEG C of mixed-cation perovskite (FA) is added dropwise0.4 (MA)0.6PbI3Precursor liquid spin coating, after the rate spin coating 3s of 1800rpm, with the rate spin coating 30s of 3600rpm, later base Piece is placed on 100 DEG C of warm table, is heated 50min, so that solvent is volatilized, solute is in mesoporous TiO2Layer and porous ZrO2Insulation branch It is crystallized on the gap and surface of rack-layer, forms perovskite active layer.
(5) finally, scratching conductive carbon paste on above-mentioned substrate, 100 DEG C of solidification 15min form carbon electrode, and natural cooling obtains To high stability perovskite solar battery.
By perovskite solar battery manufactured in the present embodiment solar simulator AM1.5G standard sunlight (intensity For 100mW/cm2) the lower test J-V indicatrix of irradiation, the short-circuit current density of the solar battery is 19.65mA/cm2, open circuit Voltage is 0.912V, and fill factor 0.454 and power conversion efficiency are 8.14%;Other performance tests and 1 phase of embodiment Together.
Comparative example
(1) FTO electro-conductive glass is successively used into tap water containing dish washing liquid, distilled water, acetone and EtOH Sonicate cleaning, drying. Then above-mentioned substrate is put into the TiCl that concentration is 0.08mol/L4In aqueous solution, after keeping the temperature 40min under the conditions of 70 DEG C, take out, It is rinsed respectively with distilled water and ethyl alcohol, drying, is placed on warm table and is heat-treated 30 minutes for 450 DEG C, nano-TiO2Form electronics Transport layer.
(2) spin coating nano-TiO on above-mentioned substrate2Slurry, speed of rotation 3800rpm, spin-coating time 30s, Zhi Hou It is heated to 200 DEG C of heat preservation 10min on warm table, continues to be heated to 500 DEG C of heat preservation 30min, cooled to room temperature is formed mesoporous TiO2Layer.
(3) lead iodide (PbI of 0.9353g is weighed2) and the iodate methylamine (AMI) of 0.3228g be put into the anhydrous N, N- of 2mL In dimethylformamide (DMF), ultrasound is made it completely dissolved, and obtains MAPbI3DMF solution;Weigh 0.9167 PbI2With The iodate carbonamidine (FMI) of 0.3420g is put into the anhydrous DMF of 2mL, and ultrasound makes it completely dissolved, and obtains FAPbI3DMF solution. Above two perovskite solution is mixed by x=0.3, is obtained mixed-cation perovskite (FA)0.3(MA)0.7PbI3Forerunner Liquid, it is spare.
(4) 1mL concentration is spiro-OMeTAD (2,2', 7,7'- tetra- [N, the N- bis- (4- methoxyphenyl) of 72.3mg/mL Amino] two fluorenes of -9,9'- spiral shell) chlorobenzene solution and 19 μ L concentration be 520mg/mL double trifluoromethanesulfonimide lithiums acetonitrile The 4- tert .-butylpyridine of solution and 29 μ L, which are uniformly mixed, obtains hole biography material precursor liquid, spare.
(5) substrate of above-mentioned steps (2) preparation is placed on warm table, is heated to 300 DEG C, keeps the temperature 10min, drives away residual Absorption water after, on dislocation sol evenning machine, 50 DEG C of spin coating of mixing perovskite (FA)0.3(MA)0.7PbI3Precursor liquid, with 1800rpm Rate spin coating 3s after, with the rate spin coating 30s of 3600rpm, substrate is placed on later on 100 DEG C of warm table, heat 40min makes solvent volatilize, and solute is in mesoporous TiO2It is crystallized on the gap and surface of layer, forms perovskite active layer.
(6) hole is added dropwise on above-mentioned substrate and passes material precursor liquid, speed of rotation 4000rpm, spin-coating time 20s, shape At hole transmission layer.
Above-mentioned steps (3)~(6) are to operate to complete in glove box, and glove box atmosphere is high-purity nitrogen, H2O steam contains Amount control is below 0.01%.
(7) above-mentioned substrate be fixed on vacuum coating equipment plated film it is intracavitary, be evacuated to the intracavitary pressure of plated film and reach 4 × 10- 4Pa, evaporation thickness are that 80nm gold obtains perovskite thin film solar battery.
In the AM1.5G standard sunlight of solar simulator, (intensity is the perovskite solar battery of comparative example preparation 100mW/cm2) the lower test J-V indicatrix of irradiation.The solar battery short-circuit current density is 21.89mA/cm2, open-circuit voltage For 1.015V, fill factor 0.726 and power conversion efficiency are 16.13%.But the solar battery is especially unstable It is fixed, it is placed 7 days in natural air item, power conversion efficiency is reduced to 11.56%, and attenuation amplitude is the 28.3% of initial value; After 14 days, power conversion efficiency is reduced to 3.72%, and attenuation amplitude is the 76.9% of initial value;After 21, substantially Electric current is not measured, device is scrapped.
Solar battery prepared by the comparative example is by FTO electro-conductive glass, TiO2Compacted zone, TiO2Mesoporous layer, mixing sun from Sub- calcium titanium ore bed, Spiro-MeOTAD base hole transmission layer and gold form electrode layer.Currently, Spiro-MeOTAD is somewhat expensive, 1 It gram is 1800 yuan, then doping and solvent etc. reach 2400 yuan containing 1 gram of Spiro-MeOTAD solution price.Noble metal pair The preparation of electrode needs vacuum evaporation process, and condition is harsh, complicated for operation.Although the perovskite solar-electricity of comparative example preparation Pond power conversion efficiency is relatively high, but standby complicated for operation, at high cost, and obtained solar cell stability is poor, uses It is worth low, cannot promote the use of.
To sum up, by comparative example 1~5 and comparative example it is found that the calcium of technical solution provided by the invention preparation Titanium ore solar battery has low cost, high power conversion efficiency and stability is strong and cheap preparation method.The sun of the invention Energy battery is made of transparent conducting glass, electron transfer layer, mesoporous layer, insulating support layer, perovskite active layer and carbon electrode layer. Expensive hole transmission layer and noble metal electrode have been abandoned from efficient perovskite solar battery structure, and have selected valence The cheap hydrophobicity carbon electrode of lattice.Under the conditions of natural air, prepared too using the simple liquid phase method such as spin coating and blade coating Positive energy battery device.The perovskite solar battery of this method preparation has power conversion efficiency high, under the conditions of natural air Feature steady in a long-term, and the advantage that preparation process is simple and manufacturing cost is cheap, can satisfy large-scale industrial metaplasia It produces and requires.
In conclusion the present invention also has the following technical effect that
(1) power conversion efficiency of perovskite solar battery provided by the invention is high, the sun prepared under optimal conditions AM1.5G standard sunlight (intensity 100mW/cm of the energy battery in solar simulator2) irradiate lower measured power transfer efficiency Up to 9.5% or more.
(2) perovskite solar battery provided by the invention has many advantages, such as moisture resistance by force and stablizes high.
(3) the perovskite solar battery technology scheme provided by the invention for preparing is under the conditions of natural air using liquid phase Not the features such as method preparation, does not need glove box, and does not need other special safeguard measures with simple process, easy to operate.
(4) do not include expensive hole transmission layer in perovskite solar battery prepared by the present invention, and be not related to true Sky vapor deposition noble metal electrode process, considerably reduces cost.
(5) technical solution provided by the invention selects carbon electrode instead of metal when preparing perovskite solar battery Electrode.Carbon electrode has hydrophobicity, when perovskite solar battery works under field conditions (factors), improves device moisture resistance, makes it Long-term stable operation, in particular to: the active layer that the present invention uses narrows (HC (NH for first2)2 +, FA+) and methylamine (CH3NH3 +, MA+) The perovskite (FA) of cation mixingx(MA)1-xPbI3, select mixed-cation steady so as to improve the material of perovskite active layer It is qualitative;Hydrophobicity carbon electrode resists erosion of the vapor to solar battery, further improves the stability of device.In high humidity Attenuation test in degree air shows that solar battery power conversion efficiency has still maintained initial value after 2 months 90% or more, it is demonstrated by out long-time stability.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Mind and principle within, any modification, equivalent replacement, improvement and so on, accompanying claims protection scope of the present invention it It is interior.

Claims (10)

1. a kind of perovskite solar battery of high stability, which is characterized in that the perovskite solar battery includes: transparent Electro-conductive glass, electron transfer layer, mesoporous layer, insulating support layer, perovskite active layer and carbon electrode layer;
The perovskite active layer is mixed-cation perovskite.
2. perovskite solar battery as described in claim 1, which is characterized in that the perovskite active layer is using a step Spin-coating method prepares perovskite active layer, and the perovskite active layer is mixed-cation perovskite (FA)x(MA)1-xPbI3, wherein x For the amount score of substance;
Preferably, the mixed-cation perovskite (FA)x(MA)1-xPbI3In x be 0.05~0.45;
More preferably, the mixed-cation perovskite (FA)x(MA)1-xPbI3Cation and methylamine cation are narrowed including first;
More preferably, the perovskite active layer infiltration is filled into mesoporous layer and insulating support layer, and covers insulating support layer Surface;
More preferably, the perovskite active layer with a thickness of 300~700nm.
3. perovskite solar battery as described in claim 1, which is characterized in that the transparent conducting glass is FTO conductive Glass;The electron transfer layer is nano-TiO2Layer;The mesoporous layer is mesoporous TiO2Layer;The insulating support layer is porous ZrO2Layer;The carbon electrode layer is hydrophobicity carbon electrode.
4. perovskite solar battery as claimed in claim 3, which is characterized in that the electron transfer layer with a thickness of 10~ 40nm;The mesoporous layer with a thickness of 150~300nm;The insulating support layer with a thickness of 150~300nm;The carbon electrode Layer with a thickness of 8~20 μm.
5. a kind of liquid phase preparation process of perovskite solar battery according to any one of claims 1-4, which is characterized in that The liquid phase preparation process is to complete all preparation process using the liquid phase method of spin coating and blade coating in natural air atmosphere;Institute Liquid phase preparation process is stated to include the following steps:
1) mixed-cation perovskite precursor liquid is prepared
Mixed-cation perovskite (FA) is prepared according to the amount score of certain substancex(MA)1-xPbI3Precursor liquid, it is spare;
2) transparent conducting glass/electron transfer layer membrane electrode preparation
FTO electro-conductive glass is put into TiCl after ultrasonic cleaning and drying4Aqueous solution processing, is then placed on warm table and calcines, shape At TiO2Electron transfer layer, to obtain transparent conducting glass/electron transfer layer membrane electrode;
3) transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode preparation
The spin coating TiO on transparent conducting glass/electron transfer layer membrane electrode of step 2) preparation2Slurry is placed in after dry On warm table after Low Temperature Heat Treatment, cooled to room temperature, then spin coating ZrO2Slurry is placed on warm table and calcines after dry Afterwards, cooled to room temperature, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode;
4) transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode preparation
Transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode prepared by step 3) is placed in warm table After upper preheating, it is added dropwise mixed-cation perovskite (FA)x(MA)1-xPbI3Precursor liquid is placed on warm table, is heated and is kept the temperature crystalline substance Change, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode;
5) perovskite solar battery is obtained
In transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite activity layer film of step 4) preparation After scratching conductive carbon paste on electrode, solidification prepares carbon electrode, to obtain stable perovskite solar battery.
6. liquid phase preparation process as claimed in claim 5, which is characterized in that in step 1), the mixed-cation perovskite (FA)x(MA)1-xPbI3The preparation process of precursor liquid includes:
Lead iodide and iodate methylamine are put into anhydrous n,N-Dimethylformamide, ultrasound makes it completely dissolved, and obtains MAPbI3's DMF solution;Lead iodide and iodate carbonamidine are put into anhydrous n,N-Dimethylformamide, ultrasound makes it completely dissolved, and obtains FAPbI3DMF solution;
By MAPbI3DMF solution and FAPbI3DMF solution mixed according to the amount score of certain substance, mixed Cationic perovskite (FA)x(MA)1-xPbI3Precursor liquid, wherein x is the amount score of substance, and x is 0.05~0.45.
7. liquid phase preparation process as claimed in claim 5, which is characterized in that in step 2), by FTO electro-conductive glass through ultrasonic clear It washes and is put into the TiCl that concentration is 0.03~0.10mol/L after drying up450~80 DEG C of 20~50min of processing of aqueous solution, then again Respectively with after deionized water and washes of absolute alcohol, it is placed in 10~40min of calcining on 400~500 DEG C of warm tables, forms nanometer TiO2Electron transfer layer, to obtain transparent conducting glass/electron transfer layer membrane electrode.
8. liquid phase preparation process as claimed in claim 5, which is characterized in that in step 3), passed in transparent conducting glass/electronics Spin coating TiO on defeated layer film electrode2Slurry after dry, is placed in after being heat-treated 8~12min on 150~250 DEG C of warm tables, from So it is cooled to room temperature;Spin coating ZrO again2Slurry after dry, is placed in after being heat-treated 25~35min on 450~600 DEG C of warm tables, Cooled to room temperature, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer film electrode.
9. the liquid phase preparation process as described in claim 5 or 8, which is characterized in that in step 4), by the electrically conducting transparent glass of preparation Glass/electron transfer layer/mesoporous layer/insulating support layer film electrode is placed on warm table after preheating, and mixed-cation calcium titanium is added dropwise Mine (FA)x(MA)1-xPbI3Precursor liquid carry out spin coating, be placed on 80~110 DEG C of warm tables, heat and keep the temperature crystallization 10~ 70min, mixed-cation perovskite (FA)x(MA)1-xPbI3Precursor liquid is on the gap and surface of mesoporous layer and insulating support layer Crystallization, to obtain transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode.
10. liquid phase preparation process as claimed in claim 5, which is characterized in that in step 5),
It scratches and leads on transparent conducting glass/electron transfer layer/mesoporous layer/insulating support layer/perovskite active layer membrane electrode After electrical carbon slurry, in 90~110 DEG C of 5~30min of solidification, hydrophobicity carbon electrode is formed, to obtain the perovskite sun of high stable It can battery.
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