文献类型：期刊文献

英文题名：Effect of chenodeoxycholic acid (CDCA) additive on phenothiazine dyes sensitized photovoltaic performance

作者：Li Jing;Wu WenJun;Yang JiaBao;Tang Jin;Long YiTao;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：2011

卷号：54

期号：4

起止页码：699

外文期刊名：SCIENCE CHINA-CHEMISTRY

收录：;EI(收录号：20111613918216);WOS:【SCI-EXPANDED(收录号:WOS:000289299400020)】；

基金：This work was supported by the National Natural Science Foundation of China (20772031 & 61006048), National Basic Research Program of China (973 Program) (2006CB806200), 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; phenothiazine; additive; co-adsorption

摘要：The effects of chenodeoxycholic acid (CDCA) in a dye solution as a co-adsorbent on the photovoltaic performance of dye-sensitized solar cells (DSSCs) based on two organic dyes containing phenothiazine and triarylamine segments (P1 and P2) were investigated. It was found that the coadsorption of CDCA can hinder the formation of dye aggregates and improve electron injection yield and thus J (sc). This has also led to a rise in photovoltage, which is attributed to the decrease of charge recombination. The DSSC based on dye P2 showed better photovoltaic performance than P1: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 89.5%, a short-circuit photocurrent density (J (sc)) of 9.57 mA/cm(2), an open-circuit photovoltage (V (oc)) of 697 mV, and a fill factor (FF) of 0.66, corresponding to an overall conversion efficiency of 4.42% under the standard global AM 1.5 solar light condition. The overall conversion efficiency was further improved to 5.31% (J (sc) = 10.36 mA/cm(2), V (oc) = 0.730 V, FF = 0.70) upon addition of 10 mM CDCA to the dye solution for TiO2 sensitization. Electrochemical impedance data indicate that the electron lifetime was improved by coadsorption of CDCA, accounting for the significant improvement of V (oc). These results suggest that interfacial engineering of the organic dye-sensitized TiO2 electrodes is important for highly efficient photovoltaic performance of the solar cell.