Synthesis and Properties of Anthrylene-Substituted Phenyleneethynylene Dyes Having Amino/Cyano Group(s) and Their Application to Dye-Sensitized Solar Cells
作者:Xin Yang、Shingo Kajiyama、Jing-Kun Fang、Feng Xu、Yu Uemura、Nagatoshi Koumura、Kohjiro Hara、Akihiro Orita、Junzo Otera
DOI:10.1246/bcsj.20110390
日期:2012.6.15
A series of anthrylene-substituted phenyleneethynylene dyes having amino/cyano group(s) were prepared by repeating Sonogashira coupling between aryl halides and terminal acetylenes. In UV–vis absorption spectra, the 9,10-anthrylene-substituted dyes showed a strong absorption band of which λmax was located from 502 to 521 nm and ε was more than 5.2 × 104 L mol−1 cm−1 indicating a highly expanded π-system in comparison with 1,5-anthrylene dye (λmax = 431 nm, ε = 2.6 × 104 L mol−1 cm−1). Lippert–Mataga plots demonstrated that the amino- and cyano-substituted dyes underwent larger charge separation in the excited states. These acetylenic dyes served as sensitizers of dye-sensitized solar cell to achieve 5.0% of photo-to-current energy conversion efficiency.
通过重复Sonogashira偶联反应,将苯乙烯炔衍生物与芳基卤化物结合,制备了一系列含有氨基/氰基团的苯乙烯炔衍生物染料。在UV-可见吸收光谱中,9,10-蒽基取代的染料显示出一个强的吸收带,其λmax位于502至521 nm之间,ε值超过5.2 × 10^4 L mol^-1 cm^-1,表明与1,5-蒽基染料(λmax = 431 nm,ε = 2.6 × 10^4 L mol^-1 cm^-1)相比,其π-系统高度扩展。Lippert-Mataga图表明,氨基和氰基取代的染料在激发态中经历了较大的电荷分离。这些炔基染料作为染料敏化太阳能电池的敏化剂,实现了5.0%的光-电流能量转换效率。