Wurtzite copper-zinc-tin sulfide as a superior counter electrode material for dye-sensitized solar cells
The Key Laboratory for Special Functional Material of MOE, Henan University, Kaifeng 475004, China
Nanoscale Research Letters 2013, 8:464 doi:10.1186/1556-276X-8-464Published: 6 November 2013
Wurtzite and kesterite Cu2ZnSnS4 (CZTS) nanocrystals were employed as counter electrode (CE) materials for dye-sensitized solar cells (DSSCs). Compared to kesterite CZTS, the wurtzite CZTS exhibited higher electrocatalytic activity for catalyzing reduction of iodide electrolyte and better conductivity. Accordingly, the DSSC with wurtzite CZTS CE generated higher power conversion efficiency (6.89%) than that of Pt (6.23%) and kesterite CZTS (4.89%) CEs.