Type-II colloidal quantum dot sensitized solar cells with a thiourea based organic redox couple

• DOI: 10.1039/c2jm15857d
• Publication Date: 2012-02-16T12:00:26Z
• Authors: Zhijun Ning; Chunze Yuan; Haining Tian; Ying Fu; Lin Li; Licheng Sun; Hans Ågren
• Keywords: Auxiliary electrode

In this paper, one kind of organic electrolyte based on tetramethylthiourea is employed for quantum dot sensitized solar cells (QDSCs). By reducing the impedance between and counter electrode, fill factor such QDSCs significantly improved. It possible to substantially increase photovoltage reach an efficiency three times higher than that a commonly used inorganic electrolyte. The light harvesting ability successfully extended by using type-II QDs, where adsorption ZnS gives additional advantage in further enhancing stability cells. observed core/shell ZnSe/CdS QDs give electron injection CdS/ZnSe proving distribution important extraction. A full working mechanism redox couple proposed.