Abstract
We report on the fabrication and characterization of CdTe thin-film solar cells with Cu-free MoO3−x /Au back contacts. CdTe solar cells with sputtered CdTe absorbers of thicknesses from 0.5 to 1.75 μm were fabricated on Pilkington SnO2:F/SnO2-coated soda–lime glasses coated with a 60- to 80-nm sputtered CdS layer. The MoO3−x /Au back contact layers were deposited by thermal evaporation. The incorporation of MoO3−x layer was found to improve the open circuit voltage (V OC) but reduce the fill factor of the ultrathin CdTe cells. The V OC was found to increase as the CdTe thickness increased.
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