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High-voltage solar cell with high short wavelength sensitivity on the base of GaAs–AlGaAs heterosystem

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  • Hrayshat, Eyad S.

Abstract

In this contribution two structures of high-voltage solar cells are discussed and analyzed. The first one is a high-voltage solar cell with only vertical p-n junctions. Therefore, the photo-current value of this structure and — consequently — the efficiency are low because of the small active p-n junction area. In order to improve the main parameters of the above mentioned structure — particularly the photo-current and the efficiency — a new structure of high-voltage solar cells, combining both horizontal and vertical p-n junctions is suggested. This structure has been elaborated by combining liquid phase epitaxy with gas-phase zinc diffusion technologies, and was grown on semi-insulating GaAs substrates with ρ=1012Ω cm. This new structure has shown better parameters than the parameters of the high-voltage solar cell with only vertical p-n junctions. It exhibits appreciable values of photo-current and output voltage. Furthermore, this structure provides both high short wavelength sensitivity, and independent efficiencies of spectral composition of solar radiation. Therefore, it can be successfully utilized in many aspects of modern science and technology, particularly as power supplies in high-located areas, and as photoacceptors of ultra-violet radiation.

Suggested Citation

  • Hrayshat, Eyad S., 2001. "High-voltage solar cell with high short wavelength sensitivity on the base of GaAs–AlGaAs heterosystem," Renewable Energy, Elsevier, vol. 23(3), pages 383-389.
    • Handle: RePEc:eee:renene:v:23:y:2001:i:3:p:383-389
    DOI: 10.1016/S0960-1481(00)00128-2
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