研究目的
This paper studies the radiation resistance for GaInP/GaInAs/Ge triple-junction space solar cells with a GaInP back-surface ?eld (BSF) in the GaInAs middle subcell compared with those with an AlGaAs BSF.
研究成果
The GaInP BSF design effectively improved the radiation resistance of GaInP/GaInAs/Ge triple-junction solar cells under geosynchronous orbit anti-irradiation performance, with a reduced degradation level of 6% compared to the AlGaAs BSF design. The mechanism involves a stronger drift electric field for minority carriers and diminished radiation-induced defects at the base region/BSF layer interface.
研究不足
The study focuses on the radiation resistance of GaInP/GaInAs/Ge triple-junction solar cells with specific BSF materials under electron beam irradiation. The findings may not be directly applicable to other types of solar cells or under different irradiation conditions.
1：Experimental Design and Method Selection:
The study compares the radiation resistance of GaInP/GaInAs/Ge triple-junction solar cells with GaInP BSF and AlGaAs BSF in the GaInAs middle subcell. The methodology involves fabricating two types of solar cells, irradiating them with a 1 MeV electron beam, and measuring their performance before and after irradiation.
2：Sample Selection and Data Sources:
The samples are GaInP/GaInAs/Ge triple-junction solar cells with either GaInP or AlGaAs BSF layers. The data sources include light I-V characteristics and EQE measurements under AM0 illumination condition.
3：List of Experimental Equipment and Materials:
The equipment includes a commercial planetary metal organic chemical vapor deposition reactor (MOCVD) (Aixtron 2800), high-resolution four-crystal diffractometer (PANalytical MRD), electron accelerator (ELV-8II), SourceMeter (Keithley 2602B), solar simulator (Spectrolab X25), and spectral external quantum efficiency (EQE) measurement system (Enlitech QE-R3018).
4：8).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The procedure involves growing epitaxial layers, fabricating solar cells, irradiating them with electron beams, and measuring their performance before and after irradiation.
5：Data Analysis Methods:
The analysis includes comparing the light I-V characteristics and EQE measurements of the two types of solar cells before and after irradiation to evaluate their radiation resistance.
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