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Germanium solar cell and preparation method and application thereof

A technology of solar cells and germanium substrates, applied in the field of solar cells, can solve the problems of inability to achieve flexibility, heavy weight of germanium solar cells, etc., and achieve the effects of increasing battery life, reducing gas resistance, and reducing fuel consumption

Active Publication Date: 2021-11-05
ZHONGSHAN DEHUA CHIP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among rigid solar cells, germanium triple-junction solar cells have the advantages of high conversion efficiency, high radiation resistance threshold, and small performance attenuation, but germanium solar cells also have shortcomings such as heavy weight and inability to achieve flexibility.

Method used

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  • Germanium solar cell and preparation method and application thereof
  • Germanium solar cell and preparation method and application thereof
  • Germanium solar cell and preparation method and application thereof

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Embodiment 1

[0102] In this embodiment, a germanium solar cell is prepared, and the specific process is as follows:

[0103] D1. Using the MOCVD method, grow the middle cell and the top cell of the solar cell epitaxial wafer 300 on the surface of the germanium substrate 200;

[0104]D2. Cleaning the parts obtained in step D1, specifically, washing with acetone for 10 minutes, isopropanol for 10 minutes, rinsing with water, and drying;

[0105] D3. Perform photolithographic protection on the parts obtained in step D2, specifically using negative photoresist, and the developing exposure energy is 230mj;

[0106] D4. Carry out thermal evaporation metallization to the part obtained in part D3, the instrument adopted is an atomic beam evaporation coating machine, and the specific composition of positive gold is: AuGeNi layer, Au layer, Au layer, Au layer, Au layer, Au layer, Ag layer and Au layer;

[0107] D5. Use a blue film stripping machine to remove the photoresist set in step D3. The spe...

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Abstract

The invention discloses a germanium solar cell and a preparation method and application thereof, and belongs to the technical field of solar cells. The germanium solar cell provided by the invention comprises a germanium substrate and an epitaxial wafer which are stacked in sequence; a groove is formed in the surface of one side, far away from the epitaxial wafer, of the germanium substrate; and the arrangement direction of the groove intersects with the <111> crystal orientation of the germanium substrate. According to the germanium solar cell, by optimizing the structural design, spherical bending of a conventional rigid solar cell can be achieved, and meanwhile the weight of a traditional germanium solar cell is reduced.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a germanium solar cell and its preparation method and application. Background technique [0002] Existing solar cells mainly fall into two categories: flexible thin-film solar cells and rigid solar cells. Among them, flexible solar cells can be bent to a certain extent, and are applicable to a wider range of scenarios; however, generally speaking, flexible solar cells have poor stability and radiation resistance, and a high rate of performance decay. [0003] Therefore, considering the replacement cost of solar cells and the compatibility with existing spacecraft structures, solar cells mounted on spacecraft are usually rigid solar cells. [0004] Among rigid solar cells, germanium triple-junction solar cells have the advantages of high conversion efficiency, high radiation resistance threshold, and small performance attenuation. However, germanium solar cells also have shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0352H01L31/036H01L31/04H01L31/18
CPCH01L31/0352H01L31/035281H01L31/036H01L31/04H01L31/1808Y02P70/50
Inventor 牛文龙杨文奕刘建庆吴倩
Owner ZHONGSHAN DEHUA CHIP TECH CO LTD
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