A flexible gallium arsenide solar cell for space and a method for manufacturing the same

By employing a GZO transparent current collection layer and optimizing the process in flexible gallium arsenide solar cells, the problems of shading and cost associated with traditional metal grid lines have been solved, achieving efficient and reliable photoelectric conversion, which is suitable for spacecraft energy systems.

CN122121320BActive Publication Date: 2026-07-24NANCHANG KAIXUN PHOTOELECTRIC CO LTD
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Patent Information

Application Number
CN202610588879.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-04-30
Publication Date
2026-07-24
Estimated Expiration
2046-04-30

AI Technical Summary

Technical Problem

Existing flexible gallium arsenide solar cells face dual technical bottlenecks in current collection layers for space applications, making it difficult to balance high efficiency, low cost, and reliability. Traditional metal grid lines have large shading areas, high costs of precious metals, and poor flexibility, while transparent conductive oxide materials have unstable performance in extreme environments, failing to meet the high-efficiency utilization requirements of spacecraft.

Method used

By replacing traditional metal grid lines with a transparent GZO current collection layer, and combining LED low-temperature light-assisted annealing and in-situ Ar/O2 mixed plasma cleaning processes, the density and interface properties of the GZO transparent film are optimized, the light-blocking area and contact resistance are reduced, and the carrier transport efficiency is improved.

Benefits of technology

It achieves a low-shading, highly flexible, and low-cost current collection layer, improving photoelectric conversion efficiency and reliability, making it suitable for the extreme environments of spacecraft and meeting the long-term use requirements of space missions.

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Abstract

The present application relates to the technical field of solar cells, in particular to a flexible gallium arsenide solar cell for space and a preparation method thereof, which comprises the following steps: bonding of a gallium arsenide epitaxial layer and a PI substrate; thinning and peeling of a GaAs substrate; preparation of a GZO transparent current collection layer; preparation of a metal electrode; deposition of an anti-reflection film layer; etching of a lower electrode and temporary bonding and peeling; the preparation of the GZO transparent current collection layer comprises magnetron sputtering of a GZO transparent film, LED low-temperature light-assisted annealing treatment and in-situ Ar / O2 mixed plasma cleaning. The present application solves key problems such as flexible substrate compatibility, interface performance optimization and space environment adaptation by the synergistic effect of the design of the GZO transparent current collection layer, LED low-temperature light-assisted annealing and in-situ Ar / O2 plasma cleaning, and is suitable for the fields of aerospace and aviation.
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