文献类型：期刊文献

英文题名：A new organic dye bearing aldehyde electron-withdrawing group for dye-sensitized solar cell

作者：Tang, Jin[1];Qu, Sanyin[1];Hu, Juan[1];Wu, Wenjun[1];Hua, Jianli[1]

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

年份：2012

卷号：86

期号：9

起止页码：2306

外文期刊名：SOLAR ENERGY

收录：;EI(收录号：20123615401042);WOS:【SCI-EXPANDED(收录号:WOS:000309079800008)】；

基金：This work was supported by NSFC/China (21161160444 and 20772031), National Basic Research 973 Program (2011CB808400), Ph.D. Programs Foundation of Ministry of Education of China (20090074110004), the Fundamental Research Funds for the Central Universities (WJ0913001) and Scientific Committee of Shanghai (10520709700).

语种：英文

外文关键词：Dye-sensitized solar cells; Diketopyrrolopyrrole; Aldehyde electron acceptor

摘要：A new metal-free dye (I) with a diketopyrrolopyrrole (DPP) core was synthesized, in which triphenylamine was used as electron donor, thiophene units as the pi-conjugated bridge, aldehyde units as electron acceptor. The corresponding dye II containing carboxy group as the electron-withdrawing acceptor for the purpose of comparison was also synthesized. The absorption spectra, electrochemical and photovoltaic properties of I and II were extensively investigated. Electrochemical measurements data indicate that the tuning of HOMO and LUMO energy levels can be conveniently accomplished by alternating electron acceptor. The short-circuit photocurrent density and conversion efficiency of solar cell based on aldehyde-containing dye is more dominant than that bear a carboxy group as the electron withdrawing anchoring group. The new sensitizer I exhibited a photovoltaic performance: a short-circuit photocurrent density (J(sc)) of 6.07 mA cm(-2), an open-circuit photovoltage (V-oc) of 568 mV, and a fill factor (FF) of 0.66, corresponding to an overall conversion efficiency of 2.27% under standard global AM 1.5 solar light condition. This work suggests that aldehyde units as new type of electron withdrawing anchoring group are promising candidates for improvement of the performance of DSSCs. (c) 2012 Elsevier Ltd. All rights reserved.