Synthesis of Specific Solvatochromic D-π-A Dyes with Pyridinium Ring as Electron-Withdrawing Group for Dye-Sensitized Solar Cells
作者:Yousuke Ooyama、Yuichiro Oda、Tomonobu Mizumo、Yutaka Harima、Joji Ohshita
DOI:10.1002/ejoc.201300465
日期:2013.7
Specific solvatochromic D-π-A-type pyridinium dyes were designed and developed as photosensitizers for dye-sensitized solar cells (DSSCs). The dyes have N-sulfobutylpyridinium or N-(carboxybutyl)pyridinium bromide as an electron-withdrawing anchoring group. The two dyes show specific solvatochromism, leading to a large bathochromic shift of the absorption band in halogenated solvents. Moreover, a dye-adsorbed
设计并开发了特定的溶剂致变色 D-π-A 型吡啶鎓染料作为染料敏化太阳能电池 (DSSC) 的光敏剂。该染料具有N-磺丁基吡啶鎓或N-(羧丁基)溴化吡啶鎓作为吸电子锚定基团。这两种染料显示出特定的溶剂化变色,导致卤化溶剂中吸收带的大红移。此外,浸入卤化溶剂中的吸附染料的二氧化钛薄膜表现出特定的溶剂化变色,卤化溶剂的染料溶液也是如此。制备了基于特定溶剂致变色 D-π-A 型吡啶鎓染料和卤化溶剂作为电解质溶剂的 DSSCs 并研究了它们的光伏性能。发现溶剂化变色染料与电解质溶液的适当组合以及溶剂化变色染料与 TiO2 表面之间的有效相互作用不仅可以提高光捕获效率 (LHE),而且可以有效地从染料向传导电子注入TiO2 的谱带 (CB)。这项工作表明,有机染料的溶剂化变色是基于有机染料敏化剂的高性能 DSSC 的关键考虑因素。