Dye-sensitized solar cells based on functionalized truxene structure  

作　　者：Fei Wu Jian-Lin Liu Lawrence Tien Lin Lee Tao Chen Min Wang Lin-Na Zhu 

机构地区：[1]Faculty of Materials and Energy, Southwest University [2]Department of Physics, The Chinese University of Hong Kong

出　　处：《Chinese Chemical Letters》2015年第8期955-962,共8页中国化学快报（英文版）

基　　金：supported by‘‘Fundamental Research Funds for the Central Universities’’(Nos.XDJK2014C145 and XDJK2014C052);the Starting Foundation of Southwest University(Nos.SWU113076 and SWU113078);the financial support from National Natural Science Foundation of China(No.51203046)

摘　　要：Three new metal-free organic dyes （TX1, TX2 and TX3） based on truxene core structure, with triphenylamine as the electron donor, thiophene as the n spacers, and cyanoacetic acid or rhodanine-3- acetic acid as the electron acceptor are designed and synthesized. Their UV-vis absorption spectra, electrochemical and photovoltaic properties were investigated. The cyanoacrylic acid is verified to be a better acceptor unit （meanwhile the anchoring group） compared to the rhodanine-3-acetic acid. And also, two anchoring groups in TX2 could provide stronger adsorption ability on the TiO2 surface. In addition, the EIS results indicate a slower charge recombination processes for TX2. As a result, dye TX2 bearing two cyanoacetic acid outperforms the other two dyes, exhibiting the photo-conversion efficiency of 2.64%, with Jsc = 5.09 mAcm^-2, Voc = 729 mV, FF = 71.1.Three new metal-free organic dyes （TX1, TX2 and TX3） based on truxene core structure, with triphenylamine as the electron donor, thiophene as the n spacers, and cyanoacetic acid or rhodanine-3- acetic acid as the electron acceptor are designed and synthesized. Their UV-vis absorption spectra, electrochemical and photovoltaic properties were investigated. The cyanoacrylic acid is verified to be a better acceptor unit （meanwhile the anchoring group） compared to the rhodanine-3-acetic acid. And also, two anchoring groups in TX2 could provide stronger adsorption ability on the TiO2 surface. In addition, the EIS results indicate a slower charge recombination processes for TX2. As a result, dye TX2 bearing two cyanoacetic acid outperforms the other two dyes, exhibiting the photo-conversion efficiency of 2.64%, with Jsc = 5.09 mAcm^-2, Voc = 729 mV, FF = 71.1.

关 键 词：Truxene Dye-sensitized solar cell Sensitizer Photovoltaic properties 

分 类 号：TM914.4[电气工程—电力电子与电力传动]