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Perovskite based flexible film solar cell and preparation method thereof

A technology for solar cells and flexible films, applied in the field of solar cells, can solve the problems of difficulty in fully utilizing graphene, easy existence of energy barriers, poor graphene contact, etc., and achieves easy control of film thickness, simple and easy production process, and interface contact. good effect

Inactive Publication Date: 2014-12-10
湖南省天赐阳光太阳能有限责任公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Defects of the existing technology: graphene initially exhibits the function of conducting electricity and collecting electrons, but in the existing preparation methods, graphene is in poor contact with other materials, and energy barriers are likely to exist, which affects the improvement of quantum efficiency, and it is difficult to give full play to the advantages of graphene. effect

Method used

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  • Perovskite based flexible film solar cell and preparation method thereof
  • Perovskite based flexible film solar cell and preparation method thereof

Examples

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preparation example Construction

[0043] Such as figure 2 Shown, a kind of preparation method of perovskite-based flexible thin-film solar cell comprises the following steps:

[0044] (1) Transparent substrate pretreatment: select a polyethylene terephthalate transparent film with a thickness of 0.2-1.0 mm, wash it with ethanol to remove floating and sinking, and dry it at room temperature;

[0045] (2) Spraying graphene negative electrode: take 1g of single-layer graphene powder, ultrasonically disperse it in 20-1000ml ethanol solution, and prepare graphene / ethanol solution with graphene concentration of 0.001-0.050g / ml, in an electrostatic field of 10 Spray on the transparent substrate under the condition of ~50kV, and directly form a graphene negative electrode layer with a thickness of 50~200nm;

[0046] (3) Spray electron transport layer: Take 1g of single-layer graphene powder and 20g of titanium dioxide nanopowder with a particle size of 50-200nm, disperse in 20-1000ml ethanol solution, and spray on g...

Embodiment 1

[0051] The preparation method of the present embodiment comprises the following steps:

[0052] (1) Transparent substrate pretreatment: select a polyethylene terephthalate (PET) transparent film with a thickness of 0.6mm, wash with ethanol to remove floating and sinking, and dry at room temperature;

[0053] (2) spray graphene negative electrode layer: get single-layer graphene powder 1g, ultrasonically disperse in 200ml ethanol solution, prepare the graphene / ethanol solution that concentration is 0.005g / ml, spray under the condition that electrostatic field is 30kV on On a transparent substrate, a graphene negative electrode layer with a thickness of 100nm is directly formed;

[0054] (3) Spray electron transport layer: take 1g of single-layer graphene powder, 20g of titanium dioxide nanopowder with a particle size of 100nm, disperse in 200ml ethanol solution, spray on the graphene negative electrode under the condition of electrostatic field of 30kV, and directly form An el...

Embodiment 2

[0060] The only difference from Example 1 is that in steps (2)(3)(4)(5), the voltage of the electrostatic field is 10kV. Other content is identical with embodiment 1.

[0061] The energy conversion efficiency of the perovskite-based flexible thin-film solar cell of this embodiment is 22%.

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Abstract

The invention discloses a perovskite based flexible film solar cell and a preparation method thereof. The perovskite based flexible film solar cell comprises a transparent substrate, a graphene negative electrode, an electronic transmission layer, a light-absorbing layer and a grapheme positive electrode. The preparation method of the perovskite based flexible film solar cell comprises the steps of: pre-treating the transparent substrate; spraying the graphene negative electrode; spraying the electronic transmission layer; spraying the light-absorbing layer; spraying the graphene positive electrode; performing heat treatment. According to the invention, static spraying way is adopted for molding; the static spraying way is to drive a raw material to pass through a nozzle by utilizing a strong static field and enable the raw material to be deposited on a base plate; a solvent is volatilized in the spraying process, and a coating with relatively high compactness can be shaped under the action of a relatively great acting force, so that the disadvantages in the prior art can be overcome efficiently. Through the static spraying way for molding, the cost is 80% lower than that of a silicon solar cell, the energy conversion efficiency is better than that of the traditional silicon solar cell and is up to 27%, so that the perovskite based flexible film solar cell can replace monocrystal to become a new generation of the flexible film solar cell.

Description

technical field [0001] The invention relates to the technical field of solar cells. Background technique [0002] Organometallic halides (CH 3 NH 3 PB 3 ) is an organic / inorganic hybrid perovskite semiconductor material with a band gap in the near-infrared region (1.7eV), which can absorb all sunlight and part of near-infrared light. It is a very excellent solar light-absorbing photovoltaic material . In recent years, with the in-depth research on the high-efficiency effect of thin-film solar cells, perovskite thin-film solar cells have gradually attracted widespread attention and reports. The highest efficiency can reach more than 18%, and there is a lot of room for improvement. [0003] Perovskite-based flexible thin-film solar cells mainly include two structures: one is based on perovskite-based nanocrystalline porous wide-bandgap semiconductor films (such as TiO 2 , ZnO, SnO 2 ) sensitized thin film battery, the other is a porous insulating material film (such as A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42H01L51/46H01L51/44
CPCH10K71/12H10K85/30H10K30/151H10K30/81H10K2102/00Y02E10/549
Inventor 王先华廖旭
Owner 湖南省天赐阳光太阳能有限责任公司
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