[9p-W933-1~11] New trend of multinary compound research ~ control of physical properties, new application~

△ [9p-W933-4] Reduction of Series Resistance in ZnSnP₂ Solar Cells by Inserting Cu₃P layer between Absorber and Back Electrode

〇Taro Kuwano¹, Ryoji Katsube¹, Yoshitaro Nose¹ (1.Kyoto Univ.)

Keywords:solar cells, ZnSnP2, Cu3P

We investigated the relationship of the structure and the carrier transport behavior at the interface between ZnSnP₂ absorber and Cu electrodes. In results, it was indicated that Cu₃P layer formed at the interface by annealing contributed to the improvements of Ohmic behavior and the reduction of resistance. However, the annealing process also caused the agglomeration of electrodes and hence increase of resistance. In this study, we suppress the agglomeration of electrodes by sputter-prepared Cu₃P layer and then succeed to decrease of resistance and improve the efficiency of ZnSnP₂ solar cells.