CN109036851A - A kind of graphene-based thin-film solar cells - Google Patents
A kind of graphene-based thin-film solar cells Download PDFInfo
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- CN109036851A CN109036851A CN201810752912.2A CN201810752912A CN109036851A CN 109036851 A CN109036851 A CN 109036851A CN 201810752912 A CN201810752912 A CN 201810752912A CN 109036851 A CN109036851 A CN 109036851A
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- graphene
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- oxide membrane
- graphene oxide
- basilar memebrane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2059—Light-sensitive devices comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/542—Dye sensitized solar cells
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of graphene-based thin-film solar cells, including transparent electrode, transparent electrode is graphene film, and thickness is not more than 20nm, and the method that the present invention filters prepares film, ensure that the uniformity of film and the stability of device；The light transmittance of film is improved by the thickness control of graphene film in Nano grade using the method that water shifts；In transfer process, microcosmic fold is introduced, increases the contact area of film and photosensitive layer；After high-temperature process, graphene defect is few, and film strength is high, can be resistant to flexible electrode it is folding during stress variation.Whole process is simple, green, easily operates.The film as light anode, to electrode etc.；In comparison, graphene has higher electron mobility, and exists without heavy metal pollution problem, reduces costs, improves phototransformation efficiency.
Description
Technical field
The present invention relates to solar battery more particularly to a kind of graphene-based thin-film solar cells.
Background technique
With getting worse for environmental problem, the uncontrolled application bring environmental problem of fossil energy increasingly causes adult
Concern.People are highly desirable to be found renewable, and free of contamination new energy substitutes the fossil energy of heavily contaminated.And solar energy
It is always object concerned by people as the source of earth statement.Wherein solar flexible battery is one of application therein, it is
Using the light induced electron effect of photoactive substance, electricity is converted light into.But traditional solar flexible battery is using ITO conduct
There are following several respects in transparent conductive electrode, first, ITO has heavy metal pollution problem；Second, ITO electric conductivity
Bad, electron mobility is low, is unfavorable for photoelectronic transmission；Third, ITO flexibility is poor, is not suitable for doing flexible electrode.
For this purpose, we devise high-intensitive, highly conductive, high transparency graphene film, it is above each existing for ITO for overcoming
Kind problem.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of graphene-based thin-film solar cells.
The purpose of the present invention is what is be achieved through the following technical solutions: a kind of graphene-based thin-film solar cells, including
Transparent electrode, the transparent electrode are graphene film, and thickness is not more than 20nm, is prepared by the following method to obtain:
(1) it is filtered on AAO basilar memebrane and obtains graphene oxide membrane；
(2) surface is fitted with to the AAO basilar memebrane of graphene film with face-up where graphene oxide membrane, is placed in the water surface
On；AAO basilar memebrane is pressed, so that AAO basilar memebrane sinks, graphene oxide membrane floats on the water surface.
(3) graphene oxide membrane for floating on the water surface is picked up from the bottom up with silicon wafer, so that graphene film is laid in base
Bottom surface；
(4) moisture in evaporation oxidation graphene film at room temperature, so that graphene oxide membrane water content is greater than 50wt%；It will
Graphene oxide membrane after evaporation process is freeze-dried, and graphene oxide membrane is detached from from silicon chip surface.
(5) graphene oxide membrane is restored at 2000~3000 DEG C, so that its conductivity is greater than 0.5MS/m.
Further, in the step 2, pressing position is the edge of AAO basilar memebrane.
Further, in the step 1 graphene with a thickness of 4nm.
Further, the porosity on the surface of the AAO basilar memebrane is not less than 40%.
The method filtered the beneficial effects of the present invention are: the present invention prepares film, ensure that the uniformity of film with
And the stability of device；Film is improved by the thickness control of graphene film in Nano grade using the method that water shifts
Light transmittance；In transfer process, microcosmic fold is introduced, increases the contact area of film and photosensitive layer；After high-temperature process, graphite
Alkene film defect content is extremely low, and conductivity and electron mobility are high, is conducive to the photoelectron transfer of organic solar batteries；At high temperature
After reason, graphene defect is few, and film strength is high, can be resistant to flexible electrode it is folding during stress variation.Entire mistake
Journey is simple, green, easily operates.While guaranteeing transparent, it ensure that great conductivity and mechanics load-carrying properties, can bear
Tension force effect of the battery in discharge process and cell flexible bending process.In use, the film as light anode, to electrode
Deng；In comparison, graphene has higher electron mobility, and exists without heavy metal pollution problem, reduces costs,
Improve phototransformation efficiency.
Detailed description of the invention
Fig. 1 is the flow diagram of AAO substrate film stripping graphene film.
Fig. 2 is the experimentation figure of embodiment 1AAO substrate film stripping graphene film.
Fig. 3 is the atomic force microscopy diagram of graphene film made from embodiment 1.
Fig. 4 is the scanning figure for the graphene film that embodiment 1 is prepared.
Fig. 5 is the atomic force microscopy diagram of graphene film made from embodiment 2.
Fig. 6 is the experimentation figure of comparative example 1MCE substrate film stripping graphene film.
Fig. 7 is graphene-based dye sensitization transparent solar cell structural schematic diagram, wherein graphene film is as light sun
Pole.
Fig. 8 is graphene-based dye sensitization transparent solar cell structural schematic diagram, wherein graphene film is as positive electricity
Pole.
In figure, quartz glass 1, graphene film 2, positive 3, ITO4.
Specific embodiment
Embodiment 1:
As shown in Figure 1, being filtered and being surpassed in AAO basilar memebrane by suction filtration method by the concentration of control graphene solution
Thin graphene oxide membrane；Surface is fitted with to the AAO basilar memebrane (porosity 40%) of graphene oxide membrane, with graphene film
Place it is face-up, be placed on the water surface, such as Fig. 1 a and 2a；AAO basilar memebrane is pressed, such as Fig. 2 b, AAO basilar memebrane starts to sink, such as
Fig. 2 c, finally, AAO basilar memebrane is sunken to bottom of a cup, graphene film (in virtual coil) floats on the water surface, such as Fig. 1 b and 2d.
The graphene film for floating on the water surface is picked up from the bottom up with silicon wafer, so that graphene film is laid in substrate surface,
Moisture in evaporation oxidation graphene film 30 minutes at room temperature, measuring graphene oxide membrane water content is 54wt%；By evaporated
Graphene oxide membrane after reason is freeze-dried, and graphene oxide membrane is detached from from silicon chip surface；As shown in figure 4, surface has
A large amount of folds；It is tested with a thickness of 4nm, as shown in Figure 3 by atomic force microscope.
Graphene oxide membrane is heat-treated using 2000 DEG C, it is 0.5MS/m, graphene film that its conductivity is measured after reduction 1h
Intensity is 10GPa.
As shown in fig. 7,1. using above-mentioned graphene film as light anode assembly organic thin film solar cell, compared to use
2., photoelectric conversion efficiency improves 91% to the dye sensitization transparent solar cell that ITO is assembled as light anode, compared to normal
The dye sensitization transparent solar cell that rule graphene film (spin coating on ITO) assemble as light anode 3., imitate by photoelectric conversion
Rate improves 37%.And when using ordinary graphite alkene film (in spin coating on ITO) as light anode, after 2400h, graphene film may
Since microstructure is destroyed, conductivity drops to 48%, and the photoelectric conversion efficiency of solar battery 3. drops to 44%；
And the graphene film of the application is using after 3600h, conductivity is maintained at original 95% or more, the photoelectricity of solar battery 1.
Transfer efficiency is maintained at original 97% or more.
Embodiment 2:
By controlling the concentration of graphene solution, filter to obtain ultra-thin oxygen reduction in AAO basilar memebrane by suction filtration method
Graphite alkene film；Surface is fitted with to the AAO basilar memebrane (porosity 60%) of graphene oxide membrane, where graphene film
Up, it being placed on the water surface, presses AAO substrate film edge, AAO basilar memebrane starts to sink, finally, AAO basilar memebrane is sunken to bottom of a cup,
Graphene film floats on the water surface, and graphene film is successfully removed.
The graphene film for floating on the water surface is picked up from the bottom up with silicon wafer, so that graphene film is laid in substrate surface,
Moisture in evaporation oxidation graphene film 30 minutes at room temperature, measuring graphene oxide membrane water content is 67wt%；By evaporated
Graphene oxide membrane after reason is freeze-dried, and graphene oxide membrane is detached from from silicon chip surface, obtains the graphite of surface folding
Alkene film tests it with a thickness of 14nm, as shown in Figure 5 by atomic force microscope.
Graphene oxide membrane is heat-treated using 2000 DEG C, it is 0.6MS/m, graphene film that its conductivity is measured after reduction 1h
Intensity is 7GPa.
1. using above-mentioned graphene film as light anode assembly dye-sensitized film solar battery, make compared to using ITO
For light anode assembling dye sensitization transparent solar cell 2., photoelectric conversion efficiency improves 87%, compared to conventional stone
3., photoelectric conversion efficiency mentions the dye sensitization transparent solar cell that black alkene film (spin coating on ITO) assembles as light anode
It is high by 29%.After using 3600h, conductivity is 95% originally, and the photoelectric conversion efficiency of solar battery 1. is original
96%.
Embodiment 3:
By controlling the concentration of graphene solution, filter to obtain ultra-thin oxygen reduction in AAO basilar memebrane by suction filtration method
Graphite alkene film；Surface is fitted with to the AAO basilar memebrane (porosity 60%) of graphene oxide membrane, where graphene film
Up, it being placed on the water surface, presses AAO substrate film edge, AAO basilar memebrane starts to sink, finally, AAO basilar memebrane is sunken to bottom of a cup,
Graphene film floats on the water surface, and graphene film is successfully removed.
The graphene film for floating on the water surface is picked up from the bottom up with silicon wafer, so that graphene film is laid in substrate surface,
Moisture in evaporation oxidation graphene film 30 minutes at room temperature, measuring graphene oxide membrane water content is 75wt%；By evaporated
Graphene oxide membrane after reason is freeze-dried, and graphene oxide membrane is detached from from silicon chip surface, obtains the graphite of surface folding
Alkene film tests it by atomic force microscope with a thickness of 20nm.
To graphene oxide membrane using 3000 DEG C thermal reduction, restore 0.2h after after measure its conductivity 0.8MS/m.Graphene
Film-strength is 9GPa.
As shown in figure 8, assembling organic thin film solar cell by light anode of ITO using above-mentioned graphene film as anode
1. compared to using platinum electrode as anode assembling dye sensitization transparent solar cell 2., photoelectric conversion efficiency raising
66%, compared to use ordinary graphite alkene film (spin coating on ITO) as anode assembling dye sensitization transparent solar cell 3.,
Its photoelectric conversion efficiency improves 13%.After using 3600h, conductivity is 96% originally, and the photoelectricity of solar battery 1. turns
Change efficiency is original 97%.
Comparative example 1
According to the suction filtration method of such as embodiment 2, filter to obtain the redox graphene with a thickness of 14nm in MCE basilar memebrane
Then surface is fitted with the MCE basilar memebrane (porosity 60%) of redox graphene film, where graphene film by film
Up, it being placed on the water surface, shown in Fig. 6 a, presses MCE substrate film edge, MCE basilar memebrane does not sink, shown in Fig. 6 b, graphene
Film stripping failure.
It should be noted that suction method is the method for most uniformly preparing graphene film generally acknowledged at present, in certain suction filtration
Under liquid measure, concentration can be regulated and controled to control the thickness of graphene film, thickness is minimum to can be one layer of graphene, with stone
The increase of black alkene concentration, under pressure, newly-increased graphene is gradually filled into the gap of first layer graphene, so that first
Layer graphene is gradually filled up completely, and then develops into the second layer, constantly repeatedly above step, can be prepared thickness and be arrived across 2 layers
The graphene nano film of up to ten thousand layers of graphene.Therefore, those skilled in the art can be adjusted by simple experiment parameter and can be obtained
Obtain the graphene film with a thickness of 4nm.
Claims (4)
1. a kind of graphene-based thin-film solar cells, which is characterized in that including transparent electrode, the transparent electrode is graphene
Film, thickness are not more than 20nm, are prepared by the following method to obtain:
(1) it is filtered on AAO basilar memebrane and obtains graphene oxide membrane；
(2) surface is fitted with to the AAO basilar memebrane of graphene film with face-up where graphene oxide membrane, is placed on the water surface；
AAO basilar memebrane is pressed, so that AAO basilar memebrane sinks, graphene oxide membrane floats on the water surface；
(3) graphene oxide membrane for floating on the water surface is picked up from the bottom up with silicon wafer, so that graphene film is laid in substrate table
Face；
(4) moisture in evaporation oxidation graphene film at room temperature, so that graphene oxide membrane water content is greater than 50wt%；It will evaporation
Treated, and graphene oxide membrane is freeze-dried, and graphene oxide membrane is detached from from silicon chip surface；
(5) graphene oxide membrane is restored at 2000~3000 DEG C, so that its conductivity is greater than 0.5MS/m.
2. graphene-based thin-film solar cells according to claim 1, which is characterized in that in the step 2, press position
It is set to the edge of AAO basilar memebrane.
3. graphene-based thin-film solar cells according to claim 1, which is characterized in that graphene in the step 1
With a thickness of 4nm.
4. graphene-based thin-film solar cells according to claim 1, which is characterized in that the table of the AAO basilar memebrane
The porosity in face is not less than 40%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110415988A (en) * | 2019-08-02 | 2019-11-05 | 西安建筑科技大学 | AAO template is the graphene quantum dot nanotube GO/YCoO of bracket3The preparation of nano-array electrode material |
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| CN110415988A (en) * | 2019-08-02 | 2019-11-05 | 西安建筑科技大学 | AAO template is the graphene quantum dot nanotube GO/YCoO of bracket3The preparation of nano-array electrode material |
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