Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
Nanotechnology. 2010 Dec 3;21(48):485202. doi: 10.1088/0957-4484/21/48/485202. Epub 2010 Nov 4.
Two indoline dyes, coded D149 and D205, were used as the sensitizers of ZnO dye-sensitized solar cells (DSCs) with optimal energy conversion efficiencies of more than 5%, under AM 1.5 full sunlight illumination (100 mW cm( - 2)). Higher interfacial charge transfer rate and retardant fluorescence decay confirmed from transient fluorescence illustrated that D205-sensitized ZnO DSCs could possess better electron transport than D149-sensitized ZnO DSCs. The enhancement of V(oc) and J(sc) for D205-sensitized ZnO DSCs was ascribed to the effective suppression of electron recombination by extending the alkyl chain on the terminal rhodanine moiety from ethyl to octyl. The evidence of enhanced electron diffusion coefficient was further shown by electrochemical impedance spectroscopy (EIS).
两种吲哚染料，编号为 D149 和 D205，被用作 ZnO 染料敏化太阳能电池（DSCs）的敏化剂，在 AM 1.5 全阳光照射（100 mW cm(-2))下，能量转换效率超过 5%。从瞬态荧光图中可以看出，较高的界面电荷转移速率和延迟荧光衰减表明，D205 敏化的 ZnO DSCs 具有比 D149 敏化的 ZnO DSCs 更好的电子传输性能。D205 敏化的 ZnO DSCs 的 V(oc)和 J(sc)的增强归因于通过将末端金硫酮部分上的烷基链从乙基延长到辛基，有效地抑制了电子复合。电化学阻抗谱（EIS）进一步证明了电子扩散系数的增强。
