A germanium solar cell and its preparation method and application

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

Active Publication Date: 2022-07-26
ZHONGSHAN DEHUA CHIP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A germanium solar cell and its preparation method and application
  • A germanium solar cell and its preparation method and application
  • A germanium solar cell and its preparation method and application

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Experimental program
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Embodiment 1

[0102] This embodiment prepares a germanium solar cell, and the specific process is as follows:

[0103] D1. Use MOCVD method to grow the middle cell and 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, cleaning with acetone for 10min, isopropanol for 10min, rinsing with water, and drying;

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

[0106] D4. thermally evaporate and add metal to the parts obtained in step D3, the instrument used is an atomic beam evaporation coating machine, and the specific composition of positive gold is: along the epitaxial layer 300 away from the surface of the germanium substrate 200, AuGeNi layer, Au layer, Ag layer and Au layer;

[0107] D5. Use a blue film stripper to remove the photoresist set in step D3. The specific ...

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Abstract

The invention discloses a germanium solar cell, a preparation method and application thereof, and belongs to the technical field of solar cells. The germanium solar cell provided by the present invention includes a germanium substrate and an epitaxial wafer which are arranged in sequence; the germanium substrate is far from the epitaxial wafer on the side surface, and is provided with a trench; the arrangement direction of the trench is the same as the <111> crystal direction of the germanium substrate staggered. By optimizing the structural design of the germanium solar cell of the present invention, the spherical curvature of the conventional rigid solar cell can be realized, and the weight of the conventional germanium solar cell can be reduced at the same time.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a germanium solar cell and a preparation method and application thereof. Background technique [0002] Existing solar cells mainly include 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 have a high performance decay rate. [0003] Therefore, considering the replacement cost of solar cells and the compatibility with existing spacecraft structures, the solar cells mounted on spacecraft are usually rigid solar cells. [0004] Among rigid solar cells, germanium triple junction solar cells have the advantages of conversion efficiency, high radiation resistance threshold, and low performance degradation. However, germanium solar cells also have disadv...

Claims

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Application Information

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Patent Type & Authority Patents(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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