文献类型：期刊文献

英文题名：Bithiazole-bridged dyes for dye-sensitized solar cells with high open circuit voltage performance

作者：He, Jinxiang;Wu, Wenjun;Hua, Jianli[1];Jiang, Yihua;Qu, Sanyin;Li, Jing;Long, Yitao;Tian, He

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：2011

卷号：21

期号：16

起止页码：6054

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY

收录：;EI(收录号：20111913961022);WOS:【SCI-EXPANDED(收录号:WOS:000289260000034)】；

基金：This work was supported by NSFC/China (20772031 and 61006048), National Basic Research 973 Program (2011CB808400), the Fundamental Research Funds for the Central Universities (WJ0913001) and Scientific Committee of Shanghai (10520709700).

语种：英文

外文关键词：Timing circuits - Conversion efficiency - Heterojunctions - Dyes - Dye-sensitized solar cells

摘要：Five new metal-free organic dyes (T1-T5) containing bithiazole moieties were synthesized and used for dye-sensitized solar cells (DSSCs). Their absorption spectra, electrochemical and photovoltaic properties were fully characterized. Electrochemical measurement data indicate that the tuning of the HOMO and LUMO energy levels can be conveniently accomplished by alternating the donor moiety. All of these dyes performed as sensitizers for the DSSC test, and the photovoltaic performance data of these bithiazole-bridged dyes showed higher open circuit voltages (745-810 mV). Among the five dyes, T1 showed the best photovoltaic performance: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 83.8%, a short-circuit photocurrent density (J(sc)) of 11.78 mA cm(-2), an open-circuit photovoltage (V-oc) of 810 mV, and a fill factor (ff) of 0.60, corresponding to an overall conversion efficiency of 5.73% under standard global AM 1.5 solar light condition, which reached 93% with respect to that of an N719-based device fabricated under similar conditions. The result shows that the metal-free dyes based on bithiazole pi-conjugation are promising candidates for improvement of the performance of DSSCs.