Reduction of defects in GaP layers grown on Si(100) by MOCVD
2021 IEEE 48TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)(2021)
Abstract
Recent advances in III-V-on-Si heteroepitaxy have led to the demonstration of multi junction solar cells with improved photovoltaic conversion efficiencies. However, their performance is still limited by a high defect concentration at the GaP/Si(100) heterointerface and in the GaP buffer layer. In order to improve the crystal quality of the III-V layers, we substitute the pure GaP nucleation layer with GaP/AlP. The concentration and type of crystal defects in GaP buffer layers grown on different nucleation layers are investigated by electron channeling contrast imaging.
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Key words
III-V-on-Si,Crystal defects,ECCI
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