摘要
合成了两种具有不同共轭链长度的双吸电子基团的三苯胺类染料TPAR3和TPAR6,研究了它们的光物理与光电化学性质,并将它们用作TiO2纳米晶电极的光敏化剂引入太阳电池.结果表明,与含有乙烯基共轭桥的染料TPAR3相比,含有丁二烯基共轭桥的染料TPAR6在甲醇溶液和TiO2膜上的最大吸收均发生一定程度的红移和宽化;但TPAR6表现出比TPAR3差的光电性能,主要是因为前者更易发生顺反异构化,电子不能够顺利地从染料激发态注入到TiO2导带中,光电流的产生得到抑制.考察了基于TPAR3的太阳电池在电解液中加入不同浓度的硫氰酸胍(GT)对光电性能的影响,发现在GT浓度为0.100mol·L-1时效率达到最大(4.02%).
Two triphenylamine-based dyes （TPAR3 and TPAR6） containing two carboxylic acid groups with different conjugated lengths were synthesized and characterized with regard to their photophysical and photoelectrochemical properties. Experimental results showed that the λmax of TPAR6 either in methanol solution or on TiO2 film was red-shifted and broadened by extending the π-conjugated bridge. However, the performance of TPAR3-based dye-sensitized solar cell （DSC） was superior to that of TPAR6. This reason was due to the serious self-quenching of the electronically excited state in TPAR6 molecule, resulting from its cis-trans isomerization. The effects of addition of guanidine thiocyanate （GT） in the electrolyte on the performance of DSCs based on TPAR3 were also investigated, revealing a maximum energy conversion efficiency of 4.02% at 0.100 mol·L-1 GT.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2008年第11期1950-1956,共7页
Acta Physico-Chimica Sinica
基金
国家重点基础研究发展规划(973)项目(2005CB623607)
天津国际科技合作项目(07ZCGHHZ00700)资助
关键词
三苯胺类染料
胍盐
太阳电池
光电转化
Triphenylamine dye
Guanidine thiocyanate
Solar cell
Photoelectric conversion
