Abstract
Abstract Large-area Cu2S/CdS solar cells were fabricated by vacuum evaporation technology alone. The Cu2S layer was obtained by the dry method, i.e. by evaporation of a CuCl film followed by a reaction bake. A CdS layer only 12 μm thick was sufficient to prevent the shunting problem. The as-deposited roughness ensured a high absorbance in the Cu2S layer without any etching. Good reproducibility was obtained by exposing the surface to a glow discharge in hydrogen. The maximum efficiency was 6.4% at 100 mW cm-2 illumination for a cell area of 11 cm2. Modules with typical peak power values of 0.3 and 1 W were fabricated and successfully tested.
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