The CdS/CdTe solar cells with reactively sputtered a-MoOx/Mo back contact

In this work amorphous MoOx thin film was used as buffer layer at back contact of CdS/CdTe solar cell. The a-MoOx thin film was made by reactive rf-sputtering from a Mo target. From DRX analysis of MoOx/glass thin film, both α-MoO₃ and β-MoO₃ phases were identified. The CdTe film was grown by conventional CSS technique. The cells were activated by annealing at 400 °C in Argon-Oxygen-CHClF₂ atmosphere. The curves of J-V and its efficiency vs. temperature of the solar cells were obtained. The solar cell efficiency at room temperature was around 11.2%. The temperature coefficient of the efficiency was 0.014%/°C in range of 40-65 °C.