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High-efficiency germanium-based flexible multi-junction solar cell and its preparation method

A solar cell and high-efficiency technology, applied in the field of solar cells, can solve the problems of poor thickness uniformity and inability to directly obtain flexible multi-junction solar cells, etc., to balance stress, improve open circuit voltage and spectral response, and improve conversion efficiency Effect

Active Publication Date: 2019-11-12
TIANJIN SANAN OPTOELECTRONICS
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  • Application Information

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Problems solved by technology

Using the substrate grinding process to thin Ge-based multi-junction solar cells usually requires the back of the Ge substrate to be pasted on styrofoam or paraffin. The uniformity is poor, resulting in a thickness uniformity difference of more than 30 microns after thinning the Ge substrate, and it is impossible to directly obtain flexible multi-junction solar cells

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  • High-efficiency germanium-based flexible multi-junction solar cell and its preparation method

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Embodiment Construction

[0019] A high-efficiency germanium-based flexible multi-junction solar cell and its preparation method according to the present invention will be described in detail below in combination with the manufacturing method.

[0020] A high-efficiency germanium-based flexible multi-junction solar cell, comprising the following steps:

[0021] 1. Clean a p-type Ge substrate 100 with a thickness of 140 μm, put it into the MOCVD reaction chamber, set the chamber pressure at 120 mbar, and run the epitaxial growth program to obtain the first Ge sub-cell 110 and the GaAs second sub-cell in sequence. A tunnel junction 120, a second InGaAs subcell 130, a second GaInP / AlGaAs tunnel junction 140, and a third GaInP subcell 150, thereby obtaining a GaInP / InGaAs / Ge triple-junction solar cell on a Ge substrate, such as figure 1 shown;

[0022] 2. Use BCB glue 200, pressure 1000kgf, and temperature 250°C for 30 minutes to bond the upper surface of the GaInP / InGaAs / Ge triple-junction solar cell on ...

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Abstract

The invention provides a high-efficiency germanium-based flexible multi-junction solar cell and a preparation method thereof. The high-efficiency germanium-based flexible multi-junction solar cell atleast includes: a flexible support substrate; a bonding layer on the flexible support substrate; a contact metal layer on the bonding layer; a polysilicon layer on the contact metal layer; a germaniumfirst sub-cell on the polysilicon layer; and other multi-junction cells on the germanium first sub-cell.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a high-efficiency germanium-based flexible multi-junction solar cell and a preparation method thereof. Background technique [0002] A solar cell is a component that can convert light energy into electrical energy. Its characteristic makes it widely used in the field of space power supply for the first time. Since the 1950s, people began to conduct research on solar cells, and then the Si solar cells developed by Bell Laboratories in the United States were first applied to the Pioneer 1 satellite, which opened the prelude to the practical application of solar cells. With the continuous innovation of solar cell theoretical research and the continuous progress of process technology, solar cells have been developed rapidly. At present, they have developed into the third generation of GaAs-based multi-junction solar cells, and the conversion efficiency and radiation resistance of cells hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/072H01L31/0725H01L31/18
CPCH01L31/072H01L31/0725H01L31/18Y02E10/50Y02P70/50
Inventor 宋明辉张蕾李明阳刘冠洲毕京锋陈文浚
Owner TIANJIN SANAN OPTOELECTRONICS
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