文献类型：期刊文献

英文题名：New fluoranthene-based cyanine dye for dye-sensitized solar cells

作者：Wu, Wenjun;Guo, Fuling;Li, Jing;He, Jinxiang;Hua, Jianli[1]

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：2010

卷号：160

期号：9-10

起止页码：1008

外文期刊名：SYNTHETIC METALS

收录：;EI(收录号：20101612861945);WOS:【SCI-EXPANDED(收录号:WOS:000277899600028)】；

基金：This work was supported by NSFC/China (20772031), Ph.D. Programs Foundation of Ministry of Education of China (20090074110004), and the Scientific Committee of Shanghai.

语种：英文

外文关键词：Nanocrystalline TiO2; Fluoranthene; Dye-sensitized solar cells

摘要：In this paper, a new fluoranthene-based unsymmetrical organic cyanine dye I and the corresponding cyanine dye II containing ethynyl unit for the purpose of comparison were designed and synthesized as sensitizers for the application in dye-sensitized solar cells (DSSCs). The absorption spectra, electrochemical and photovoltaic properties of I and H were extensively investigated. The DSSCs based on the fluoranthene dye I showed the better photovoltaic performance: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 67%, a short-circuit photocurrent density (J(sc)) of 7.83 mA cm(-2), an open-circuit photovoltage (V-oc) of 0.476 V. and a fill factor (ff) of 0.63, corresponding to an overall conversion efficiency of 2.34% under simulated AM 1.5G solar light condition. Also, the effects of chenodeoxycholic acid (COCA) in a solution as a co-adsorbate on the photovoltaic performance of DSSCs based on cyanine dyes were also investigated. The presence of CDCA for 0.5 h, increases both the photovoltage and photocurrent of the DSSC incorporating I, in which the photovoltage and photocurrent increase 9.3% and 20%, respectively. The above photovoltaic results indicate that coadsorption of appropriate amount COCA is effective to improve solar cell performance. (C) 2010 Elsevier B.V. All rights reserved.