Sputtered seed-assisted growth of CuS nanosheet arrays as effective counter electrodes for quantum dot-sensitized solar cells

Abstract CuS nanosheet arrays (NSAs) obtained by combining a physical radio frequency (RF) sputtered CuS seeding process with a facile and green hydrothermal post-treatment, are employed as counter electrodes (CEs) for quantum dot-sensitized solar cells (QDSSCs). Such CuS NSAs show superior electrocatalytic ability as compared to the conventional Pt CEs and other three types of CuS nanosheet films prepared via different methods.