| 초록 |
Quantum dot-sensitized solar cells (QDSCs) are currently being actively researched as next-generation solar cells. Many studies have already been conducted in various ways to increase the conversion efficiency and stability. The biggest cause of the decrease in the photoconversion efficiency of QDSCs is charge recombination on the surface of the photoanode. In this paper, a study was conducted to reveal the effect of poly(vinyl pyrrolidone) (PVP) additive in the electrolyte on the photovoltaic performances of QDSCs. In this work, heavy-metal-free QDSCs based on Cu-In-Se QDs were fabricated and the PVP was incorporated in the electrolyte to protect surface defects at the photoanode, leading to the reduction in the charge recombination. In particular, the concentration of PVP additives was controlled, and the resulting photovoltaic performances were characterized. Various photoelectrochemical analyzes such as J-V curve, IPCE and impedance analysis were used to investigate the effect of PVP-added electrolytes on QDSCs at various concentrations. |
