High-efficiency flexible laminated thin-film solar cell and preparation method thereof

A solar cell and high-efficiency technology, applied in the field of solar cells, can solve the problems of lack of low-bandgap polymers, backward performance of tandem devices, and limited application range, etc., to achieve the effects of increasing hole concentration, optimizing efficiency, and improving efficiency

Active Publication Date: 2020-07-10
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for polymer solar cells, due to the lack of suitable low-bandgap polymers, the performance of their tandem devices is significantly behind that of single-layer solar cells.
In addition, the disadvantage of the laminated battery of the bottom battery made of crystalline silicon commonly used at present is that the silicon wafer is thick and cannot be bent, which also limits its application range.

Method used

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  • High-efficiency flexible laminated thin-film solar cell and preparation method thereof
  • High-efficiency flexible laminated thin-film solar cell and preparation method thereof
  • High-efficiency flexible laminated thin-film solar cell and preparation method thereof

Examples

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Effect test

Embodiment 1

[0057] combine figure 1 and figure 2 As shown, the present invention provides a high-efficiency flexible laminated thin-film solar cell and a preparation method thereof, the preparation method comprising:

[0058] S01, preparing a bottom cell 1, the P-type semiconductor absorber layer of the bottom cell 1 is a copper indium selenium absorber layer 10;

[0059] S02, preparing the top cell 2, the bandgap of the top cell 2 is wider than that of the bottom cell 1;

[0060] S03, using a mechanical stacking method to stack the top cell 2 on the bottom cell 1 .

[0061] In this embodiment, the narrow-bandgap bottom cell 1 and the wide-bandgap top cell 2 can be fabricated independently, and then formed in a 4-terminal stacked structure using a mechanical stacking method. Not only can the band gap be flexibly selected to distribute light absorption, but also the It requires current matching and is easier to prepare. After the top cell 2 is stacked on the bottom cell 1, a top ohmic...

Embodiment 2

[0091] Different from Example 1, the top cell 2 of the stacked thin film solar cell of this embodiment can be a perovskite (perovskite) cell or a cadmium telluride (CdTe) cell, and the semiconductor absorber layer corresponding to the top cell 2 is a perovskite absorber layer or CdTe. Using a CIS flexible cell with a bandgap of about 1.0eV as the bottom cell 1, combined with a wide bandgap flexible perovskite and a cadmium telluride thin-film solar front cell with a bandgap of about 1.7eV, the efficiency can be as high as 30%. double-junction tandem flexible solar cells.

[0092] Such as Figure 4 Shown is a schematic diagram of the structure of the perovskite top cell.

[0093] The perovskite top cell 2 is mainly composed of a photoanode 201 , an electron transport layer (ETL) 202 , a perovskite absorption layer 203 , a hole transport layer (HTL) 204 , and a back electrode 205 . The photoanode 201 is generally a fluorine-doped oxide (FTO), and the back electrode 205 is gen...

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Abstract

The invention discloses a high-efficiency flexible laminated thin-film solar cell and a preparation method thereof, the laminated thin-film solar cell comprises a bottom cell and a top cell stacked onthe bottom cell, a P-type semiconductor absorption layer of the bottom cell is a copper indium selenium absorption layer, and a band gap of the top cell is wider than that of the bottom cell. According to the solar cell, a narrow bandgap copper indium selenium solar cell is adopted as the bottom cell; a flexible battery can be prepared by taking various flexible materials as substrates; the narrow bandgap copper-indium-selenium solar cell and the wide bandgap solar cell are combined to grow on the flexible substrate; the laminated cell is formed by adjusting the forbidden band width. The solar cell is formed by superposing according to the band gap width degree, so that the purpose of covering different absorption wavelength ranges is achieved, the efficiency of the flexible and bendablelaminated cell is optimized, the forbidden band width can be flexibly selected to distribute the light absorption effect by adopting a mechanical stacking method, current matching is not needed, and the preparation process is simpler.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a high-efficiency flexible laminated thin-film solar cell and a preparation method thereof. Background technique [0002] At present, the efficiency of single-layer cells is close to the theoretical limit efficiency, and its improvement space is small. The tandem solar cell technology provides an effective method to improve the efficiency of solar cells by combining two or more solar cells with different absorption bands to obtain a wider range. wavelength of solar radiation. [0003] An effective way to improve the efficiency of polymer solar cells is also to adopt a tandem structure, which minimizes the thermalization loss of photon energy by utilizing a wider solar radiation spectrum. However, for polymer solar cells, due to the lack of suitable low-bandgap polymers, the performance of their tandem devices is significantly behind that of single-layer solar cells. In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/043H01L31/0445H01L31/0392
CPCH01L31/18H01L31/043H01L31/0445H01L31/03928Y02E10/541Y02P70/50
Inventor 姚琳李伟民杨春雷杨兵许述达李文杰冯叶
Owner SHENZHEN INST OF ADVANCED TECH
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