| 초록 |
High-performance Förster resonance energy transfer (FRET)-based dye-sensitized solar cells (DSSCs) have been successfully fabricated via optimized design of a CdSe/CdS quantum dot (QD) donor and a dye acceptor. This simple approach enables quantum dots and dyes to simultaneously utilize the wide solar spectrum, resulting in high conversion efficiency over a wide range of wavelength. In addition, major parameters affecting the FRET interaction between donor and acceptor are investigated including the fluorescent emission spectrum of QD, and the content of deposited QDs into the TiO2 matrix. By judicious control of these parameters, the FRET interaction can be readily optimized for high photovoltaic performance. In addition, the as-synthesized water-soluble quantum dots are highly dispersed in a nanoporous TiO2 matrix, resulting in excellent contact between donors and acceptors. Importantly, high performance FRET-based DSSCs can be prepared without any infrared (IR) dye synthetic procedures. |
