Effect of Thickness of Electron Reflector Layer on the Efficiency of CdS/CdTe Heterojunction Thin-Film Solar Cell

ZnO/CdS /CdTe solar cell performance modeling has been done using AFORS-HET. Device simulation is used to investigate the effect of the thickness of ER layer on the efficiency of a CdS/CdTe Heterojunction Thin-Film Solar cell. Simulation analysis is used to optimize the experimental base device under AM1.5 solar spectrum. Efficiency of the device is observed by varying thickness of the extended electron reflector region from 100nm to 10,000nm with an Ohmic contact and a doping density of
${7} \times {10}^{{16}}\ {cm}^{-{3}}$
. Efficiency obtained for a 500nm ER layer is 28.71% and FF is 79.37. The characteristic I-V results show that samples with higher CdTe thickness have higher efficiencies.