文献类型：期刊文献

英文题名：Synthesis, characterization and photovoltaic properties of two novel near-infrared absorbing perylene dyes containing benzo[e]indole for dye-sensitized solar cells

作者：Jin, Yinghua;Hua, Jianli[1];Wu, Wenjun;Ma, Xuemei;Meng, Fanshun

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2008

卷号：158

期号：1-2

起止页码：64

外文期刊名：SYNTHETIC METALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000255107800010)】；

语种：英文

外文关键词：perylene imide derivatives; dye-sensitized solar cell; photovoltaic properties

摘要：Two novel near-infrared absorbing perylene imide derivatives (I and II) with benzo[e]indole were designed and synthesized as sensitizers for dye-sensitized solar cells (DSSCs), and their structures were characterized by H-1 NMR, C-13 NMR, FT-IR, UV-vis, MS-ESI spectra, etc. The absorption spectra, electrochemical and photovoltatic properties of I and II were extensively investigated. Two perylene dyes have wide absorption hands with high molar extinction coefficients over the entire visible spectrum. Electrochemical properties indicated that the electron injection process from the excited dye molecule to TiO2 conduction band was energetically permitted. However, the preliminary photophysical and photoelectrochemical measurements show that the two perylene dyes have lower overall conversion efficiency on DSSCs application, although they have broad and intense absorption spectra in the visible region (up to 800 nm). This may be that the perylene imide group, which contains strong electron-withdrawing nature has effect on the polarity of the whole molecule, resulting in the unbeneficial transferring direction of photo-generated electrons, which decreases the overall photocurrent performance. (C) 2008 Elsevier B.V. All rights reserved.