p-Type CuCrO particulate films as the hole transporting layer for CHNHPbI perovskite solar cells.

CuCrO with a crystal structure of delafossite is a promising material as a transparent conducting oxide. It shows unique properties, for example, wide band gap, good chemical stability, and p-type carrier transporting character. The oxide layers with delafossite structure have been suggested as hole transporting materials for organic-inorganic CHNHPbI perovskite solar cells.