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A kind of thin-film solar cell and component, and the preparation method of both

A technology of thin-film solar cells and solar cells, applied in electrical components, circuits, photovoltaic power generation, etc., can solve the problems of high manufacturing cost of flexible thin-film batteries, poor substrate temperature resistance, and high equipment requirements, and achieve low cost and low equipment requirements , The effect of low preparation cost

Active Publication Date: 2016-07-06
北京大昱光伏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of traditional flexible thin film solar cells, the equipment requirements are high, and the process is limited by the poor temperature resistance of the substrate (especially polymer substrates, such as PI, PET, PEN, etc.); making the preparation cost of flexible thin film solar cells High, battery efficiency is low, which greatly limits the development of flexible thin film battery industry, especially transparent substrate flexible thin film battery industry

Method used

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  • A kind of thin-film solar cell and component, and the preparation method of both
  • A kind of thin-film solar cell and component, and the preparation method of both
  • A kind of thin-film solar cell and component, and the preparation method of both

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Embodiment 1）

[0044] See figure 1 , the flexible thin film solar cell of the present invention, from bottom to top is flexible transparent substrate 1, thin film solar cell front electrode 2, thin film solar cell body layer 3 and battery back electrode 4; The light transmittance of thin film solar cell front electrode 2 is high At 90%, the surface resistance is lower than 50Ω / sq. The material of the flexible transparent substrate 1 is PI, PET or PEN.

[0045] The preparation steps are:

[0046] Step 1: If Figure 4 As shown, a graphene film is prepared on a temporary substrate 8 as the front electrode 2 of a thin film solar cell; through chemical modification and optimization of the number of layers, the light transmittance of the graphene film is higher than 90%, and the surface resistance is lower than 50Ω / sq; Temporary substrate 8 is copper foil or nickel foil or ruthenium or iridium or silicon or silicon carbide or mica; The method for preparing graphene film is chemical vapor deposi...

Embodiment 2）

[0054] Compared with Example 1, in step one, the graphene surface work function is adjusted by surface modification, improving its contact with the solar cell functional layer; as Figure 6 As shown, the front electrode of the thin film solar cell is in contact with the P layer of the thin film solar cell body layer 3, and the graphene work function is improved to be higher than the work function of the P layer, and the front electrode 2 of the thin film solar cell forms an ohmic contact with the P layer, as shown in Fig. Among them, Wg represents the graphene work function; Wp represents the work function of the battery and the graphene contact functional layer; E refers to the energy level (the probability that the electron is in the state of the energy level); Eo refers to the vacuum energy level of the semiconductor or metal, that is, the electron Ec refers to the conduction band of the semiconductor; Ev refers to the valence band of the semiconductor; between Ec and Ev is ...

Embodiment 3）

[0056] Compared with Example 2, step 2 also includes adding a transition layer 10 between the front electrode 2 of the thin film solar cell and the body layer 3 of the thin film solar cell; if the P layer of the body layer 3 of the thin film solar cell is in contact with the transition layer 10, Then the valence band of the transition layer 10 is equal to the valence band of the P layer of the thin film solar cell body layer 3 in contact with it, and the conduction band is higher than the conduction band of the P layer of the thin film solar cell body layer 3 in contact with it; if What is in contact with the transition layer 10 is the N layer of the thin film solar cell body layer 3, then the conduction band of the transition layer 10 is equal to or lower than the conduction band of the N layer of the thin film solar cell body layer 3 in contact with it, and the valence band is lower than The valence band of the N layer of the thin film solar cell body layer 3 in contact with ...

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Abstract

The invention discloses a thin-film solar cell, a thin-film solar cell assembly and preparation methods of the thin-film solar cell and the thin-film solar cell assembly. The preparation method of the thin-film solar cell comprises the following steps of preparing a graphene thin film on a temporary substrate for serving as a thin-film solar cell front electrode; attaching the temporary substrate growing with the graphene thin film to a supporting substrate, and then preparing a thin-film solar cell body layer and a cell back electrode; coating a transfer protecting layer on the cell back electrode; etching the temporary substrate; transferring the cell to a transparent flexible substrate; removing the transfer protecting layer. After the method disclosed by the invention is adopted, preparation of the thin film cell can be completed through traditional equipment, the temperature resistance limitation of the flexible substrate is avoided, and the preparation cost of grapheme is low compared with that of the traditional TCO electrode; the preparation method of the flexible thin film cell is greatly simplified, and the preparation cost of the cell is reduced.

Description

technical field [0001] The invention relates to a flexible thin-film solar cell, a preparation method thereof, and a photovoltaic module composed of the flexible thin-film solar cell. Background technique [0002] Flexible solar panel is an emerging technology product in the world's solar industry. It is a solar panel made of resin-encapsulated amorphous silicon as the main photoelectric element layer on a base plate made of flexible materials. Folding, the obvious advantage of being easy to carry, so it has a wide range of uses. However, in the preparation process of traditional flexible thin film solar cells, the equipment requirements are high, and the process is limited by the poor temperature resistance of the substrate (especially polymer substrates, such as PI, PET, PEN, etc.); making the preparation cost of flexible thin film solar cells High, battery efficiency is low, which greatly limits the development of flexible thin film battery industry, especially transpare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L31/0224
CPCH01L31/022425H01L31/022466H01L31/03926H01L31/048H01L31/1884H01L31/1896Y02E10/50Y02P70/50
Inventor 庄春泉王勇胡居涛符政宽吴卫民王志强赵沁灵
Owner 北京大昱光伏科技有限公司
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