Evaluation of the CdS/CdTe heterojunction solar cell

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Abstract
A variety of CdS/CdTe heterojunctionsolar cells have been prepared by the vacuum evaporation of n‐CdS films onto single‐crystal p‐CdTe substrates. Comparisons have been made between cells prepared using different substrate resistivities, substrate surface preparations, and CdSfilm resistivities. The mechanisms controlling the dark junction current, photocarrier collection, and photovoltaicproperties with junction interface states present are modeled. A solar efficiency of 7.9% under 85 mW/cm2 of solar simulator illumination was measured on a cell with an indium‐tin‐oxide coating and a glycerol antireflection coating.

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