Single-step in-situ preparation of thin film electrolyte for quasi-solid state quantum dot-sensitized solar cells

Natural polysaccharide Konjac glucomannan (KGM) is, for the first time, applied as the polymer matrix for thin film gel electrolyte in CdS/CdSe quantum dot-sensitized solar cells (QDSCs). The predominance of this thin film quasi-solid state QDSCs lies in the in-situ preparation of the electrolyte and Cu2S counter electrode in one step without mold, which can significantly simplify the cell fabrication process. The cell based on this electrolyte presents an energy conversion efficiency of 4.0% under AM 1.5 illumination of 100 mW cm−2 with excellent stability compared to that of liquid-based QDSCs. [Display omitted] ► In-situ preparation for the thin film electrolyte and Cu2S electrode in one step. ► As high conversion efficiency as the liquid-based QDSCs. ► Good stability of polysaccharide-based quasi-solid state QDSCs.