文献类型：期刊文献

英文题名：New starburst sensitizer with carbazole antennas for efficient and stable dye-sensitized solar cells

作者：Tang, Jin[1];Hua, Jianli;Wu, Wenjun;Li, Jing;Jin, Zeguo;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：2010

卷号：3

期号：11

起止页码：1736

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;EI(收录号：20104513370165);WOS:【SCI-EXPANDED(收录号:WOS:000283602400012)】；

基金：This work was supported by NSFC/China (20772031), National Basic Research 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 - Cyclic voltammetry - Stars - Antennas - Polycyclic aromatic hydrocarbons

摘要：A new starburst organic sensitizer (I) with carbazole units as antennas and the corresponding dyes (II and III) with starburst triphenylamine or one triphenylamine moiety (for the purpose of comparison) were designed and synthesized, in which carbazole or triphenylamine moieties were used as the electron donor, thiophene units as the pi-conjugated bridge, and a cyanoacrylic acid group as the electron acceptor. The photophysical and electrochemical properties of the dyes were investigated by UV-vis spectrometry and cyclic voltammetry. Electrochemical measurement data indicate that the tuning of the HOMO and LUMO energy levels can be conveniently accomplished by alternating the donor moiety. Photovoltaic devices with carbazole dye I showed a maximum monochromatic incident photon to current efficiency (IPCE) of 89% and an overall conversion efficiency of 4.4% under full sunlight (AM 1.5G, 100mWcm(-2)) irradiation. The dyes were also tested in quasi-solid-state devices and showed good efficiencies. The stability of devices was performed over 1200 h in full sunlight and at 50 degrees C. The sensitizer I with carbazole antennas exhibited good stability, retaining 95% of its initial efficiency, while dyes II and III retained 82% and 46% after 1200 h of irradiation, respectively. This result means that carbazole is a photostable hole-transporting moiety for use in dye-sensitized solar cells.