文献类型：期刊文献

英文题名：Novel dyes based on naphthalimide moiety as electron acceptor for efficient dye-sensitized solar cells

作者：Huang, Xiaomei[1,2];Fang, Yi[3];Li, Xin[1,2];Xie, Yongshu[1,2];Zhu, Weihong[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2011

卷号：90

期号：3

起止页码：297

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20111113741425);WOS:【SCI-EXPANDED(收录号:WOS:000289125000013)】；

基金：This work was financially supported by NSFC/China, the Oriental Scholarship, SRFDP 200802510011 and 20100074110015, the Fundamental Research Funds for the Central Universities (WK1013002), Innovation Program of Shanghai Municipal Education Commission, and State Key Laboratory of Precision Spectroscopy (ECNU).

语种：英文

外文关键词：Naphthalimide; Electron acceptor; Indoline; Synthesis; Sensitizers; Solar cells

摘要：Four novel naphthalimide-based dyes (D-1, D-2, D-3 and D-4) were synthesized and utilized as sensitizers in dye-sensitized solar cells (DSCs), in which the triphenylamine (TPA) or indoline groups, naphthalimide unit and carboxylic group were functionalized as electron donor, acceptor and anchoring group, respectively. The naphthalimide unit was employed as the pi-conjugation ring and electron acceptor for effectively realizing intramolecular charge separation in the oxidized states. In the series of dyes, the LUMO orbital is delocalized mainly on naphthalimide moieties, especially on the carbonyl group. Consequently, the LUMO electrons are isolated from the carboxyl anchoring group (-CH2CO2H) due to the presence of the methylene group, which could suppress the electron injection efficiency from the excited dyes to the TiO2 conduction band, thus leading to the inferior efficiencies of 1.10, 1.18, 2.27 and 2.70%, respectively, even though they exhibit broad spectral response and high extinction coefficients. (C) 2011 Elsevier Ltd. All rights reserved.