New Organic Dyes Based on Biarylmethylene-Bridged Triphenylamine for Dye Sensitized Solar Cell  

作　　者：Fei Wu Haitao Liu Lawrence Tien Lin Lee Tao Chen Min Wang Linna Zhu 

机构地区：[1]Faculty of Materials and Energy, Southwest University, Chongqing 400715, China [2]Department of Physics, The Chinese University ofHong Kong, Shatin, New Territories, Hong Kong, China

出　　处：《Chinese Journal of Chemistry》2015年第8期925-933,共9页中国化学（英文版）

摘　　要：Three new organic dyes were synthesized and characterized for applications in dye-sensitized solar cells （DSSCs）. In these dyes, diarylmethylene-bridged triphenylarnine is the donor, and different acceptors and vinyl- thiophene are designed to get TBA-1, TBA-2 and TBA-3. Their photophysical, electrochemical and photovoltaic properties were investigated, and the effects of the acceptor structures as well as the linkage on these properties were evaluated. Results demonstrated that the vinylthiophene linkage between the donor and the acceptor is favor- able for improving light harvesting ability of TBA-2. In addition, the electrochemical impedance spectroscopy ex- periments suggest larger Rrec and longer electron lifetime of TBA-2. Therefore, it outperforms the other dyes, exhib- iting the highest power conversion efficiency of 3.87%, with Jsc of 8.25 mAocm-2 and Voc of 666 mV. Unfortunately, the TBA-3 with three acceptor groups only shows efficiency of 3.52%, indicating that the design of increasing ac- ceptor groups plays little role on enhancing the solar cell efficiency.Three new organic dyes were synthesized and characterized for applications in dye-sensitized solar cells （DSSCs）. In these dyes, diarylmethylene-bridged triphenylarnine is the donor, and different acceptors and vinyl- thiophene are designed to get TBA-1, TBA-2 and TBA-3. Their photophysical, electrochemical and photovoltaic properties were investigated, and the effects of the acceptor structures as well as the linkage on these properties were evaluated. Results demonstrated that the vinylthiophene linkage between the donor and the acceptor is favor- able for improving light harvesting ability of TBA-2. In addition, the electrochemical impedance spectroscopy ex- periments suggest larger Rrec and longer electron lifetime of TBA-2. Therefore, it outperforms the other dyes, exhib- iting the highest power conversion efficiency of 3.87%, with Jsc of 8.25 mAocm-2 and Voc of 666 mV. Unfortunately, the TBA-3 with three acceptor groups only shows efficiency of 3.52%, indicating that the design of increasing ac- ceptor groups plays little role on enhancing the solar cell efficiency.

关 键 词：diarylmethylene-bridged triphenylamine dye-sensitized solar cells ACCEPTOR rhodanine-3-acetic acid 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TP333.4[自动化与计算机技术—计算机系统结构]