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A graphene-based thin film solar cell

A technology of solar cells and graphene films, applied in the field of solar cells, can solve the problems of poor ITO conductivity, heavy metal pollution of ITO, unsuitable flexible electrodes, etc., so as to improve light conversion efficiency, facilitate photoelectron transmission, and achieve high conductivity. and mechanical load-carrying properties

Active Publication Date: 2018-12-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional solar flexible battery uses ITO as a transparent conductive electrode, which has the following problems. First, ITO has the problem of heavy metal pollution; second, ITO has poor conductivity and low electron mobility, which is not conducive to the transmission of photoelectrons. ; Third, ITO has poor flexibility and is not suitable for flexible electrodes

Method used

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  • A graphene-based thin film solar cell
  • A graphene-based thin film solar cell
  • A graphene-based thin film solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, by controlling the concentration of the graphene solution, an ultra-thin graphene oxide film is obtained by suction filtration on the AAO base membrane by suction filtration; , placed on the water surface with the graphene membrane facing up, such as figure 1 a and 2a; press the AAO basement membrane, as figure 2 b, AAO basement membrane begins to sink, as figure 2 c, Finally, the AAO basement membrane sinks to the bottom of the cup, and the graphene membrane (inside the dotted circle) floats on the water surface, as shown in figure 1 b and 2d.

[0026] Use a silicon chip to pick up the graphene film floating on the water surface from bottom to top, so that the graphene film is tiled on the surface of the substrate, evaporate the water in the graphene oxide film at room temperature for 30 minutes, and measure the water content of the graphene oxide film as 54wt%; the graphene oxide film after the evaporation treatment is freeze-dried, and t...

Embodiment 2

[0030] By controlling the concentration of the graphene solution, the ultra-thin reduced graphene oxide film is obtained by suction filtration at the AAO base membrane by suction filtration; Place the graphene membrane facing upwards, place it on the water surface, press the edge of the AAO basement membrane, the AAO basement membrane begins to sink, and finally, the AAO basement membrane sinks to the bottom of the cup, the graphene membrane floats on the water surface, and the graphene membrane is successfully peeled off.

[0031] Use a silicon chip to pick up the graphene film floating on the water surface from bottom to top, so that the graphene film is tiled on the surface of the substrate, evaporate the water in the graphene oxide film at room temperature for 30 minutes, and measure the water content of the graphene oxide film as 67wt%; The graphene oxide film after the evaporation treatment is freeze-dried, and the graphene oxide film is detached from the silicon wafer su...

Embodiment 3

[0035] By controlling the concentration of the graphene solution, the ultra-thin reduced graphene oxide film is obtained by suction filtration at the AAO base membrane by suction filtration; Place the graphene membrane facing upwards, place it on the water surface, press the edge of the AAO basement membrane, the AAO basement membrane begins to sink, and finally, the AAO basement membrane sinks to the bottom of the cup, the graphene membrane floats on the water surface, and the graphene membrane is successfully peeled off.

[0036] Use a silicon chip to pick up the graphene film floating on the water surface from bottom to top, so that the graphene film is tiled on the surface of the substrate, evaporate the water in the graphene oxide film at room temperature for 30 minutes, and measure the water content of the graphene oxide film as 75wt%; the graphene oxide film after the evaporation treatment is freeze-dried, and the graphene oxide film is detached from the surface of the s...

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Abstract

The invention discloses a graphene-based thin film solar cell, comprising a transparent electrode, wherein the transparent electrode is a graphene film, and the thickness is not more than 20 nm. The thin film is prepared by a suction filtration method to ensure the uniformity of the thin film and the stability of the device. A water transfer method is used to control the thickness of the graphenefilm at a nanometer level, and the transmittance of the film is improved. During the transfer process, micro-wrinkles are introduced to increase the contact area between the film and the photosensitive layer. After high temperature treatment, the graphene defects are few and the film strength is high, which can withstand the stress change in the process of repeated folding of the flexible electrode. The whole process is simple, green and easy to operate. The thin film serves as a photoanode, a counter electrode and the like; and in contrast, graphene has higher electron mobility and no heavy metal pollution problem exists, the cost is reduced and the light conversion efficiency is improved.

Description

technical field [0001] The invention relates to solar cells, in particular to a graphene-based thin film solar cell. Background technique [0002] With the increasingly serious environmental problems, the environmental problems brought about by the uncontrolled application of fossil energy have increasingly attracted the attention of adults. People are eager to find renewable, non-polluting new energy sources to replace heavily polluting fossil energy sources. And solar energy, as a source of earth statement, has been the object of attention. Among them, solar flexible cells are one of the applications, which use the photogenerated electron effect of photosensitive materials to convert light into electricity. However, the traditional solar flexible battery uses ITO as a transparent conductive electrode, which has the following problems. First, ITO has the problem of heavy metal pollution; second, ITO has poor conductivity and low electron mobility, which is not conducive t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/048H01G9/20B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G9/042H01G9/048H01G9/2059Y02E10/542Y02P70/50
Inventor 高超彭蠡沈颖俞丹萍卡西克燕.戈坡塞米
Owner ZHEJIANG UNIV
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