CN105070839A - Polymer solar cell and manufacturing method thereof - Google Patents
Polymer solar cell and manufacturing method thereof Download PDFInfo
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Abstract
The invention provides a polymer solar cell and a manufacturing method thereof. The polymer solar cell comprises a glass substrate, an anode layer, an anode decoration layer, an active layer and a cathode layer which are successively overlapped from bottom to top. The polymer solar cell is characterized in that an interface between the active layer and the cathode layer has a mutually complementary peak-valley-shaped micro-nano structure, the peak width of the peak-valley-shaped micro-nano structure is 300-400 [mu]m, the peak height of the peak-valley-shaped micro-nano structure is 20-30 nm, and the active layer contains poly3-hexylthiophene (P3HT):[6.6]-C60-methyl benzene (PCBM) and a propylene glycol methyl ether acetate (PGMEA). The invention further provides a simple method for preparing the polymer solar cell. The micro-nano structure expands the contact interface of the cathode and active layers, collection efficiency of an electrode for charge is improved, and efficiency of the polymer solar cell is improved.
Description
Technical field
The invention belongs to photovoltaic material and device preparation field, the present invention relates to especially and a kind of there is polymer solar battery of micro-nano structure negative electrode and preparation method thereof.
Background technology
The waste gas pollution on the environment that is day by day exhausted and that produce when burning of traditional fossil energy (coal, oil, natural gas) allows people recognize the urgency finding regenerative resource.The energy of current low-carbon environment-friendly mainly contains waterpower, solar energy, wind energy etc., wherein solar energy due to have inexhaustible, with not to the utmost, and to advantages such as environments, people can not to be received and pay attention to more and more widely.
Silica-based solar cell commercially achieves huge success at present, but due to complex manufacturing technology, cost remains high, and can produce noxious substance in the production purification process of silicon, and there is certain safety and pollution hidden trouble, development is restricted.Polymer solar battery because of its raw material sources wide, cheap, preparation technology is simple, can the method film forming such as spin coated, spraying, printing be passed through on flexible substrates, this not only greatly reduces manufacturing cost, and can large area film forming, this becomes possibility with regard to making the photovoltaic cell preparing low-cost large-area.Through the development of two more than ten years, the efficiency of polymer solar battery has had significant raising, but compared with the inorganic solar cell of maturation, the efficiency of polymer solar battery is also lower.The key factor that restriction efficiency improves is the factors such as spectral response range is not mated with solar spectrum, exciton diffusion length is short, carrier mobility is low and the collection efficiency of electrode pair electric charge is low of organic semiconducting materials.
Recent study personnel introduce the micro-nano structure electrode extensively adopted in inorganic solar cell in organic solar batteries, find that micro-nano structure electrode can improve the efficiency of transmission of electric charge carrier in active layer and the collection efficiency of electrode pair electric charge.Prepare micro-nano structure negative electrode often by means of template (as silicon template, porous alumina formwork etc.), active layer material is made to have micro-nano structure by the method for nano impression, when electrode evaporation, electrode material can form the complementary structure mutually nested with active layer, thus prepares the negative electrode of micro-nano structure.Although this method can prepare the organic solar batteries with micro-nano structure electrode, but preparation technology is loaded down with trivial details, nano impression cost is high, and in experimentation, usually release agent will be used from active layer sur-face peeling to make template, release agent is easy cleaning not, active layer surface can be polluted, affect the performance of photovoltaic device.
Summary of the invention
In order to solve problems of the prior art, the invention provides and a kind ofly there is the polymer solar battery of micro-nano structure negative electrode and a kind of method described in preparation with micro-nano structure cathode polymer solar cell is provided, when not by template, make the active layer of polymer solar battery spontaneously can form micro-nano structure, and then make the negative electrode of surperficial evaporation thereon have the micro-nano structure nested against one another with active layer, thus preparation has the polymer solar battery of micro-nano structure negative electrode, and improve the efficiency of polymer solar battery.
On the one hand, the invention provides a kind of polymer solar battery with micro-nano structure negative electrode, described polymer solar battery comprises the glass substrate superposed successively from bottom to top, anode layer, anode modification layer, active layer and cathode layer, it is characterized in that, the upper surface of described active layer has the micro-nano structure of spontaneous formation, described micro-nano structure is peak width is 300 ~ 400 μm, peak height is the erose peak and valley structure of 20 ~ 30nm, described active layer comprises poly-3-hexyl thiophene (P3HT): [6.6]-C60-phenylbutyric acid methyl esters (PCBM) and 1-Methoxy-2-propyl acetate (PGMEA).
Preferably, described active layer uses the active layer solution be made up of P3HT:PCBM and PGMEA to be prepared by spin coating.
Preferably, described active layer solution is prepared by being mixed in P3HT:PCBM mixed solution by PGMEA, and wherein by volume, described PGMEA accounts for 1% ~ 4% of P3HT:PCBM mixed solution, is preferably 2%.
Preferably, the thickness of described active layer is 80 ~ 120nm, is preferably 100nm.
Preferably, described substrate is glass substrate, and described anode layer is tin indium oxide (ITO); Described anode modification layer is Polyglycolic acid fibre: kayexalate (PEDOT:PSS) film, and preferably, the thickness of described anode modification layer is 30 ~ 50nm; And/or described cathode layer is aluminium electrode, preferably the thickness of described cathode layer is 100nm.
On the other hand, the invention provides a kind of method preparing the polymer solar battery as above with micro-nano structure negative electrode, said method comprising the steps of:
(1) carry out UV ozone process to the anode layer after cleaning, preferably, the time of described UV ozone process is 8-15min, is more preferably 10min;
(2) with sol evenning machine the PEDOT:PSS aqueous solution is spin-coated on described in step (1) on the anode layer of UV ozone process, to prepare PEDOT:PSS film; Then anneal dry described PEDOT:PSS film, to form PEDOT:PSS anode modification layer, preferably, described annealing drying for annealing dry 30min at the temperature of 150 DEG C;
(3) ultrasonic process active layer solution 5 ~ 30min, be preferably 15min, then with sol evenning machine treated active layer solution is spin-coated on above the PEDOT:PSS anode modification layer formed in step (2), to prepare active layer, wherein said active layer solution is prepared by being mixed in P3HT:PCBM mixed solution by PGMEA, and wherein by volume, described PGMEA accounts for 1% ~ 4% of P3HT:PCBM mixed solution, be preferably 2%;
(4) on the active layer prepared by step (3), pass through the method evaporation negative electrode of thermal evaporation, then obtained device is carried out after annealing process at the temperature of 120-160 DEG C, thus the peak valley shape micro-nano structure of spontaneous formation complementation between described active layer and cathode layer, the peak width of described peak valley shape micro-nano structure is 300 ~ 400 μm, peak height is 20 ~ 30nm, and the time of described after annealing process is 10-80min.
Preferably, in step (2), the rotating speed 3000rps of described sol evenning machine, spin-coating time is 50 seconds.
Preferably, in step (3), the rotating speed of described sol evenning machine is 1500rpm, and spin-coating time is 45s.
Preferably, in step (4), the speed of described evaporation is
be preferably
Preferably, in step (5), the temperature of described after annealing process is 150 DEG C, and the time of after annealing process is 30-80min, is preferably 50min.
In the present invention, 1-Methoxy-2-propyl acetate (PGMEA) is mixed in P3HT:PCBM mixed solution and prepare active layer solution, by carrying out ultrasonic process to active layer solution and carrying out to obtained polymer solar cell device the P3HT crystallization that after annealing process PGMEA can make in solution, make the peak valley shape micro-nano structure of spontaneous formation complementation between active layer and cathode layer, the peak width of described peak valley shape micro-nano structure is 300 ~ 400 μm, peak height is 20 ~ 30nm (Fig. 1).At this active layer AM aluminum metallization electrode on the surface, then aluminium (Al) atom is deposited on active layer surface gradually, form the cathode layer with micro-nano structure nested against one another with active layer pattern, thus the obtained polymer solar cell device with micro-nano structure cathode layer.On the one hand, described micro-nano structure negative electrode and active layer material are interted mutually, shorten the transmission path of electric charge carrier in active layer, are conducive to the transmission of charge carrier.On the other hand, described micro-nano structure expands the contact interface of negative electrode and active layer material, improves the collection efficiency of electrode pair electric charge, improves the efficiency of polymer solar battery.The present invention is by the reunion of P3HT, spontaneously micro-nano structure is defined at the upper surface of active layer, under the prerequisite not increasing additional process (as nano impression), prepare the polymer solar battery with micro-nano structure negative electrode, improve the energy conversion efficiency of polymer solar battery.Meanwhile, present invention also offers a kind of straightforward procedure preparing polymer solar battery.
Accompanying drawing explanation
Fig. 1 is atomic force microscope (AFM) shape appearance figure on active layer surface;
Fig. 2 is the structural representation of polymer solar battery;
Fig. 3 shows the Current density-voltage characteristic curve of the polymer solar battery prepared according to embodiments of the invention 2-6;
Fig. 4 shows the Current density-voltage characteristic curve of the polymer solar battery prepared according to embodiments of the invention 7-8;
Fig. 5 shows the Current density-voltage characteristic curve of the polymer solar battery prepared according to embodiments of the invention 9-11.
Description of reference numerals
Glass substrate: 1; Anode: 2; Anode modification layer: 3; Active layer: 4; Negative electrode: 5.
Embodiment
In order to understand the present invention better, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that implementation column described herein is only and explain object of the present invention, do not limit protection scope of the present invention.
The experimental technique used in the present invention if no special instructions, is conventional method.
The material used in the present invention, reagent etc., if no special instructions, obtain by commercial sources.
Abbreviation
AFM represents atomic force microscope;
ITO represents tin indium oxide;
PEDOT:PSS represents Polyglycolic acid fibre: kayexalate;
P3HT represents poly-3-hexyl thiophene;
PCBM represents [6.6]-C60-phenylbutyric acid methyl esters;
PGMEA represents 1-Methoxy-2-propyl acetate.
Definition
As used in the present disclosure, P3HT:PCBM mixed solution is the chlorobenzene solution being dissolved in P3HT and PCBM prepared in the chlorobenzene of 1ml by the PCBM of P3HT and 12mg by 15mg.
Experiment reagent used in the present invention and instrument:
1-Methoxy-2-propyl acetate (purity 99%) is purchased from lark prestige Science and Technology Ltd.;
Poly-3-hexyl thiophene (P3HT) and [6.6]-C60-phenylbutyric acid methyl esters (PCBM) are all purchased from machine Micron Technology Co., Ltd;
PEDOT:PSS (CleviosPVPA14083), purchased from H.C.Starck company, is be dissolved in the PEDOT:PSS of 1.3wt% the conductivity water solution formed in water;
Chlorobenzene is bought from Sigma-Aldrich company;
Acetone (concentration 99.5%), alcohol (concentration 99.5%);
High-purity aluminium wire (purity >99.999%) for plated electrode is bought from Zhong Nuo green wood company.
The ito glass substrate used in the present invention is purchased from Zhuhai Kaivo Optoelectronic Technology Co., Ltd., and square resistance is 15 Ω/.
The desk-top sol evenning machine of KW-4A type that sol evenning machine manufactures and designs purchased from Microelectronics Institute of the Chinese Academy of Sciences.
The photovoltaic performance parameter of polymer solar battery, uses Keithley4200 digital sourcemeter at 100mW/cm
2standard analog sunlight (AM1.5G) under measure Current density-voltage characteristic curve, and to calculate.
The thickness of PEDOT:PSS layer and active layer is measured by the DektakXT type probe-type surface profiler of German Brooker company and is obtained.
The AFM shape appearance figure on active layer surface obtains with the JEOLJSPM-5400 type scanning probe microscopy test that Jeol Ltd. produces.
The Ultrasound Instrument that ultrasonic process uses is that model is KQ-300DV purchased from Kunshan ultrasonic instrument Co., Ltd.
Embodiment 1
Be mixed with the pattern test of the active layer film surface of PGMEA
The preparation of active layer solution take chlorobenzene as solvent, mass/volume (w/v) than for 15mg/ml:12mg/ml P3HT:PCBM mixed solution in mix account for by volume P3HT:PCBM mixed solution 2% PGMEA prepare active layer solution, preserve under room temperature.
The transparent conductive glass surface that ITO washing lotion wiping sputtering has ITO is dipped by swab stick, until glass surface has continuous print moisture film, afterwards ito glass is successively put into deionized water, acetone (concentration 99.5%) and alcohol (concentration 99.5%), ultrasonic 30 minutes respectively.Carry out UV ozone process to ito anode layer, the time is 10min.The PEDOT:PSS solution filtering head of 0.45 μm is filtered, with the rotating speed of 3000rpm, PEDOT:PSS solution is spun to ITO surface with sol evenning machine afterwards, spin-coating time be 50 seconds to prepare PEDOT:PSS film, make film thickness be about 40nm.Afterwards by PEDOT:PSS film at the temperature of 150 DEG C drying and annealing 30 minutes to form PEDOT:PSS anode modification layer.By ultrasonic for active layer solution process 15 minutes, be then spin-coated on to prepare active layer above PEDOT:PSS film with sol evenning machine by treated active layer solution, sol evenning machine rotating speed was 1500rpm, and spin-coating time is 45s.By obtained active layer film after annealing 15 minutes at the temperature of 150 DEG C.
The obtained active layer film JEOLJSPM-5400 type scanning probe microscopy that Jeol Ltd. produces is tested its AFM surface topography.
Fig. 1 is that PGMEA content is the AFM surface topography map of the active layer film of 2% by volume.As seen from Figure 1, there is the peak valley shape micro-nano structure that peak width is 300 ~ 400nm, peak height is 20 ~ 30nm on the surface of active layer film.
Embodiment 2
Do not adulterate PGMEA polymer solar battery preparation and property test
The preparation of active layer solution take chlorobenzene as solvent, is that the P3HT:PCBM of 15mg/ml:12mg/ml is dissolved in chlorobenzene solution, prepares mass ratio active layer solution, preserve under room temperature.
The transparent conductive glass surface that ITO washing lotion wiping sputtering has ITO is dipped by swab stick, until glass surface has continuous print moisture film, afterwards ito glass is successively put into deionized water, acetone (concentration 99.5%) and alcohol (concentration 99.5%), ultrasonic 30 minutes respectively.Carry out UV ozone process to ito anode layer, the time is 10min.The PEDOT:PSS solution filtering head of 0.45 μm is filtered, with the rotating speed of 3000rpm, PEDOT:PSS solution is spun to ITO surface with sol evenning machine afterwards, spin-coating time be 50 seconds to prepare PEDOT:PSS film, make film thickness be about 40nm.Afterwards by PEDOT:PSS film at the temperature of 150 DEG C drying and annealing 30 minutes to form PEDOT:PSS anode modification layer.By ultrasonic for active layer solution process 15 minutes, be then spin-coated on to prepare active layer above PEDOT:PSS film with sol evenning machine by treated active layer solution, sol evenning machine rotating speed was 1500rpm, and spin-coating time is 45s.Then obtained active tunic is transferred to AM aluminum metallization electrode in vacuum coating chamber, the vacuum degree in chamber remains on 5 × 10
-4about Pa, evaporation rate and thickness are monitored in real time by quartz crystal oscillator, to ensure the uniformity of evaporated film.After plated film completes, obtain solar cell, obtained polymer solar battery is annealed 30 minutes at the temperature of 150 DEG C.
With Keithley4200 digital sourcemeter at 100mW/cm
2standard analog sunlight (AM1.5G) under measure the Current density-voltage characteristic curve of polymer solar battery, as shown in Figure 3, and calculate the photovoltaic performance parameter of polymer solar battery according to Current density-voltage characteristic curve: open circuit voltage (U
oc), short-circuit current density (J
sc), fill factor, curve factor (FF) and power conversion efficiency (PCE).Open circuit voltage refers to when not having current circuit, the voltage that device produces after illumination; Short-circuit current density refers to when extra electric field is zero, the current density that the device by illumination can produce when forming loop; Fill factor, curve factor refers to the peak power output (U of battery
mj
m) with the ratio of open circuit voltage and short-circuit current density product, that is:
Power conversion efficiency refers to peak power output P
mwith irradiation power P
inratio, namely
In formula, J
sCbe short-circuit current density, unit is mA/cm
2; P
inbe irradiation power, unit is mW/cm
2.
Embodiment 3
The preparation and property test of the polymer solar battery of doping PGMEA
The transparent conductive glass surface that ITO washing lotion wiping sputtering has ITO is dipped by swab stick, until glass surface has continuous print moisture film, afterwards ito glass is successively put into deionized water, acetone (concentration 99.5%) and alcohol (concentration 99.5%), ultrasonic 30 minutes respectively.Carry out UV ozone process to ito anode layer, the time is 10min.The PEDOT:PSS solution filtering head of 0.45 μm is filtered, with the rotating speed of 3000rpm, PEDOT:PSS solution is spun to ITO surface with sol evenning machine afterwards, spin-coating time be 50 seconds to prepare PEDOT:PSS film, make film thickness be about 40nm.Afterwards by PEDOT:PSS film at the temperature of 150 DEG C drying and annealing 30 minutes to form PEDOT:PSS anode modification layer.Take chlorobenzene as solvent, at mass ratio be mix in the P3HT:PCBM solution of 15mg/ml:12mg/ml volume be 1% PGMEA prepare active layer solution, by ultrasonic for active layer solution 15 minutes, then be spin-coated on above PEDOT:PSS film and prepare active layer, sol evenning machine rotating speed 1500rpm, spin-coating time 45s.Then by the film transfer for preparing to evaporating Al electrode in vacuum coating chamber, the vacuum degree in chamber remains on 5 × 10
-4about Pa, evaporation rate and thickness are monitored in real time by quartz crystal oscillator, to ensure the uniformity of evaporated film.After plated film completes, obtained polymer solar battery is annealed 30 minutes at the temperature of 150 DEG C.Then, with Keithley4200 digital sourcemeter at 100mW/cm
2standard analog sunlight (AM1.5G) under measure the Current density-voltage characteristic curve of polymer solar battery, as shown in Figure 3, and calculate the photovoltaic performance parameter of polymer solar battery according to Current density-voltage characteristic curve: open circuit voltage (U
oc), short-circuit current density (J
sc), fill factor, curve factor (FF) and power conversion efficiency (PCE).Design parameter is in table 1.
Embodiment 4
The preparation and property test of the polymer solar battery of doping PGMEA
Content except PGMEA is except 2%, and all the other operations are identical with embodiment 3.Current density-voltage characteristic curve, as shown in Figure 3.Design parameter is in table 1.
Embodiment 5
The preparation and property test of the polymer solar battery of doping PGMEA
Content except PGMEA is except 3%, and all the other operations are identical with embodiment 3.Current density-voltage characteristic curve, as shown in Figure 3.Design parameter is in table 1.
Embodiment 6
The preparation and property test of the polymer solar battery of doping PGMEA
Content except PGMEA is except 4%, and all the other operations are identical with embodiment 3., Current density-voltage characteristic curve, as shown in Figure 3.Design parameter is in table 1.
Embodiment 7
The polymer solar battery adopting different ultrasonic time to prepare and performance test
The transparent conductive glass surface that ITO washing lotion wiping sputtering has ITO is dipped by swab stick, until glass surface has continuous print moisture film, afterwards ito glass is successively put into deionized water, acetone (concentration 99.5%) and alcohol (concentration 99.5%), ultrasonic 30 minutes respectively.Carry out UV ozone process to ito anode layer, the time is 10min.The PEDOT:PSS solution filtering head of 0.45 μm is filtered, with the rotating speed of 3000rpm, PEDOT:PSS solution is spun to ITO surface with sol evenning machine afterwards, spin-coating time be 50 seconds to prepare PEDOT:PSS film, make film thickness be about 40nm.Afterwards by PEDOT:PSS film at the temperature of 150 DEG C drying and annealing 30 minutes to form PEDOT:PSS anode modification layer.Take chlorobenzene as solvent, at mass ratio be mix in the P3HT:PCBM solution of 15mg/ml:12mg/ml volume be 2% PGMEA prepare active layer solution, by ultrasonic for active layer solution 5 minutes, then be spin-coated on above PEDOT:PSS film and prepare active layer, sol evenning machine rotating speed 1500rpm, spin-coating time 45s.Then by the film transfer for preparing to evaporating Al electrode in vacuum coating chamber, the vacuum degree in chamber remains on 5 × 10
-4about Pa, evaporation rate and thickness are monitored in real time by quartz crystal oscillator, to ensure the uniformity of evaporated film.After plated film completes, obtained polymer solar battery is annealed 30 minutes at the temperature of 150 DEG C.Then, with Keithley4200 digital sourcemeter at 100mW/cm
2standard analog sunlight (AM1.5G) under measure the Current density-voltage characteristic curve of polymer solar battery, as shown in Figure 4, and calculate the photovoltaic performance parameter of polymer solar battery according to Current density-voltage characteristic curve: open circuit voltage (U
oc), short-circuit current density (J
sc), fill factor, curve factor (FF) and power conversion efficiency (PCE).Design parameter is in table 1.
Embodiment 8
The polymer solar battery adopting different ultrasonic time to prepare and performance test
Except ultrasonic 30 minutes of active layer solution, all the other operations are identical with embodiment 7.Current density-voltage characteristic curve, as shown in Figure 4.Design parameter is in table 1.
Embodiment 9
The polymer solar battery adopting the different after annealing time to prepare and performance test
The transparent conductive glass surface that ITO washing lotion wiping sputtering has ITO is dipped by swab stick, until glass surface has continuous print moisture film, afterwards ito glass is successively put into deionized water, acetone (concentration 99.5%) and alcohol (concentration 99.5%), ultrasonic 30 minutes respectively.Carry out UV ozone process to ito anode layer, the time is 10min.The PEDOT:PSS solution filtering head of 0.45 μm is filtered, with the rotating speed of 3000rpm, PEDOT:PSS solution is spun to ITO surface with sol evenning machine afterwards, spin-coating time be 50 seconds to prepare PEDOT:PSS film, make film thickness be about 40nm.Afterwards by PEDOT:PSS film at the temperature of 150 DEG C drying and annealing 30 minutes to form PEDOT:PSS anode modification layer.Take chlorobenzene as solvent, at mass ratio be mix in the P3HT:PCBM solution of 15mg/ml:12mg/ml volume be 2% PGMEA prepare active layer solution, by ultrasonic for active layer solution 15 minutes, then be spin-coated on above PEDOT:PSS film and prepare active layer, sol evenning machine rotating speed 1500rpm, spin-coating time 45s.Then by the film transfer for preparing to evaporating Al electrode in vacuum coating chamber, the vacuum degree in chamber remains on 5 × 10
-4about Pa, evaporation rate and thickness are monitored in real time by quartz crystal oscillator, to ensure the uniformity of evaporated film.After plated film completes, to obtained polymer solar battery after annealing 15 minutes at the temperature of 150 DEG C.Then, with Keithley4200 digital sourcemeter at 100mW/cm
2standard analog sunlight (AM1.5G) under measure the Current density-voltage characteristic curve of polymer solar battery, as shown in Figure 5, and calculate the photovoltaic performance parameter of polymer solar battery according to Current density-voltage characteristic curve: open circuit voltage (U
oc), short-circuit current density (J
sc), fill factor, curve factor (FF) and power conversion efficiency (PCE).Design parameter is in table 1.
Embodiment 10
The polymer solar battery adopting the different after annealing time to prepare and performance test
Except to obtained polymer solar battery at the temperature of 150 DEG C except after annealing 50 minutes, all the other operations are identical with embodiment 9.Current density-voltage characteristic curve, as shown in Figure 5.Design parameter is in table 1.
Embodiment 11
The polymer solar battery adopting the different after annealing time to prepare and performance test
Except to obtained polymer solar battery at the temperature of 150 DEG C except after annealing 80 minutes, all the other operations are identical with embodiment 9.Current density-voltage characteristic curve, as shown in Figure 5.Design parameter is in table 1.
The polymer solar battery with micro-nano structure negative electrode of table 1 prepared by embodiment 2-11, at 100mW/cm
2standard analog sunlight (AM1.5G) under measure the photovoltaic performance parameter obtained.
Table 1:PGMEA content, ultrasonic time and after annealing time are on the impact of current density, open circuit voltage, fill factor, curve factor and power conversion efficiency
Annotation: "-" expression does not mix PGMEA.
As shown in Table 1, polymer solar battery (the embodiment 3 prepared of PGMEA that volume ratio is 1% ~ 4% is mixed in P3HT:PCBM solution, embodiment 4, embodiment 5, embodiment 6) be significantly improved than the power-conversion efficiencies of the polymer solar battery (embodiment 2) not mixing PGMEA, especially, the polymer solar battery (embodiment 4) prepared when volume ratio is the PGMEA of 2% is mixed in P3HT:PCBM solution, power conversion efficiency is improved the most obvious, 17% is improve than the power-conversion efficiencies of the polymer solar battery (embodiment 2) not mixing PGMEA,
Embodiment 4, embodiment 7, embodiment 8 compared for the impact of active layer solvent supersonic time on polymer solar battery power conversion efficiency, can find out ultrasonic 15 minutes and can obtain maximum power conversion efficiency;
Embodiment 4, embodiment 9, embodiment 10, embodiment 11 compared for the impact of after annealing on polymer solar battery performance, can find out that the power conversion efficiency of the polymer solar battery that the polymer solar battery that annealing time obtains for 30 ~ 80 minutes obtains than annealing for 15 minutes is significantly improved, especially, the power conversion efficiency of the polymer solar battery obtained when the after annealing time is 50 minutes is the highest.
Claims (10)
1. a polymer solar battery, described polymer solar battery comprises the glass substrate, anode layer, anode modification layer, active layer and the cathode layer that superpose successively from bottom to top, it is characterized in that, interface between described active layer and cathode layer is in complementary peak valley shape micro-nano structure, the peak width of described peak valley shape micro-nano structure is 300 ~ 400 μm, peak height is 20 ~ 30nm, and described active layer comprises poly-3-hexyl thiophene (P3HT): [6.6]-C60-phenylbutyric acid methyl esters (PCBM) and 1-Methoxy-2-propyl acetate (PGMEA).
2. polymer solar battery according to claim 1, is characterized in that, described active layer uses the active layer solution be made up of P3HT:PCBM and PGMEA to be prepared by spin coating.
3. polymer solar battery according to claim 2, it is characterized in that, described active layer solution is prepared by being mixed in P3HT:PCBM mixed solution by PGMEA, wherein by volume, described PGMEA accounts for 1% ~ 4% of P3HT:PCBM mixed solution, is preferably 2%.
4. the polymer solar battery according to any one of claim 1-3, is characterized in that, the thickness of described active layer is 80 ~ 120nm, is preferably 100nm.
5. the polymer solar battery according to any one of claim 1-3, is characterized in that, described substrate is glass substrate, and described anode layer is tin indium oxide (ITO); Described anode modification layer is Polyglycolic acid fibre: kayexalate (PEDOT:PSS) film, and preferably, the thickness of described anode modification layer is 30 ~ 50nm; And/or described cathode layer is aluminium electrode, preferably the thickness of described cathode layer is 100nm.
6. prepare a method for the polymer solar battery according to any one of claim 1-5, said method comprising the steps of:
(1) carry out UV ozone process to the anode layer after cleaning, preferably, the time of described UV ozone process is 8-15min, is more preferably 10min;
(2) with sol evenning machine the PEDOT:PSS aqueous solution is spin-coated on described in step (1) on the anode layer of UV ozone process, to prepare PEDOT:PSS film; Then anneal dry described PEDOT:PSS film, to form PEDOT:PSS anode modification layer, preferably, described annealing drying for annealing dry 30min at the temperature of 150 DEG C;
(3) ultrasonic process active layer solution 5-30min, be preferably 15min, then with sol evenning machine treated active layer solution is spin-coated on above the PEDOT:PSS anode modification layer formed in step (2), to prepare active layer, wherein said active layer solution is prepared by being mixed in P3HT:PCBM mixed solution by PGMEA, and wherein by volume, described PGMEA accounts for 1% ~ 4% of P3HT:PCBM mixed solution, be preferably 2%;
(4) on the active layer prepared by step (3), pass through the method evaporation negative electrode of thermal evaporation, then obtained device is carried out after annealing process at the temperature of 120-160 DEG C, thus the peak valley shape micro-nano structure of spontaneous formation complementation between described active layer and cathode layer, the peak width of described peak valley shape micro-nano structure is 300 ~ 400 μm, peak height is 20 ~ 30nm, and the time of described after annealing process is 10-80min.
7. method according to claim 6, is characterized in that, in step (2), the rotating speed 3000rps of described sol evenning machine, spin-coating time is 50 seconds.
8. method according to claim 6, is characterized in that, in step (3), the rotating speed of described sol evenning machine is 1500rpm, and spin-coating time is 45s.
9. method according to claim 6, is characterized in that, in step (4), the speed of described evaporation is
be preferably
10. method according to claim 6, is characterized in that, in step (5), the temperature of described after annealing process is 150 DEG C, and the time of after annealing process is 30-80min, is preferably 50min.
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