Variation of ZnTe:Cu sputtering target preparation and impacts on film properties and CdS/CdTe solar cell performance
A commonly produced commercial thin-film solar cell consists of cadmium telluride (CdTe) as the p-type material, and cadmium sulfide (CdS) as the n-type. High-performance CdS/CdTe thin-film photovoltaic (PV) devices can be produced by incorporating a copper-dopped zinc telluride (ZnTe:Cu) interface layer between the CdTe absorber and a titanium (Ti) outer metal contact. This contacting process not only enable low-resistance tunneling between the ZnTe:Cu and Ti but allows Cu diffusion into the CdTe, increasing the net-acceptor concentration, leading to higher efficiency cells. Thin-film ZnTe:Cu ...
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