Abstract
Cadmium sulfide (CdS) thin films were prepared by simple thermal evaporation at different substrate temperatures. Increasing the substrate temperature during CdS deposition led to a significant increase in the CdS film resistivity due to a reduction in carrier concentration and degradation in the carrier mobility. SEM results showed that high substrate temperature yielded large grain size of CdS films. In n-CdS/p-CdTe heterojunction solar cells fabricated employing CdS films deposited at different substrate temperatures, efficiency was found to decrease due to a reduction in open-circuit voltage (Voc) and fill-factor (FF) affected by high substrate temperature during deposition of CdS films.
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