Modification of nonlinear optical dyes for dye sensitized solar cells: a new use for a familiar acceptor
作者:Dinesh G. Patel、Nick M. Bastianon、Paul Tongwa、Janelle M. Leger、Tatiana V. Timofeeva、Glenn P. Bartholomew
DOI:10.1039/c0jm03774e
日期:——
The chemistry of electron deficient π-acceptors offers unique challenges in the rational design and synthesis of organic dyes for use in solar cells. We have synthesized 2-cyano-2-(3-cyano-4-((E)-4-(dibutylamino)styryl)-5,5-dimethylfuran-2(5H)-ylidene)ethanoic acid (2), a dye containing an carboxylated version of the strongly electron withdrawing TCF group by way of stepwise synthesis and isolation of 2,5-dihydro-2-imino-4,5,5-trimethylfuran-3-carbonitrile (5), previously only available as an intermediate available via microwave chemistry. We use this dye to sensitize nanocrystalline TiO2 in order to examine its efficacy in dye-sensitized solar cells. Crystal structures of an intermediate and the final dye are presented and the isomerization about the terminal alkene is discussed in addition to preliminary solar cell data.
缺电子π受体化学为合理设计和合成用于太阳能电池的有机染料带来了独特的挑战。我们通过逐步合成和分离2,5-二氢-2-亚氨基-4,5,5-三甲基呋喃-3-腈(5)——此前仅通过微波化学获得的中介体——合成了2-氰基-2-(3-氰基-4-((E)-4-(二丁基氨基)苯乙烯基)-5,5-二甲基呋喃-2(5H)-亚基)乙酸(2),这是一种含有羧基化强电子吸引TCF基团的染料。我们利用这种染料敏化纳米晶TiO2,以检验其在染料敏化太阳能电池中的效能。我们给出了一个中介体和最终染料的晶体结构,并讨论了末端烯烃的异构化以及初步的太阳能电池数据。