Investigations of the energetic and thermal characteristics of a module based on a Fresnel lens and a hetero-photo-converter in the AlGaAs-GaAs system

The energetic and thermal characteristics of a photobattery module based on a Fresnel lens and a hetero-photo-converter (HPC) in the AlGaAs-GaAs system are investigated. One has been shown experimentally an influence of volumetric irregularities regarding resistance of heterostructures formed up in active areas due to the diffusion of Zn atoms on p-n-junction boundaries under liquid-phase epitaxy on the photoconverter loading characteristics at low illumination levels. A substantial influence of the spread resistance on the HPC optimal parameters at elevated illuminations has been shown. For the regime chosen, the temperature of the cells reaches up to 80°C, and, at that temperature, it has no influence on the contacts' properties and the space factor of the converter's voltage-current characteristics (VCC). The module generates power up to 650 mW without forced cooling and allows combining it with a solar-heat collector.[PUBLICATION ABSTRACT]