Tuning the Spectroscopic,Electrochemical, and Photovoltaic Properties of Triaryl Amine Based Sensitizers through Ring‐Fused Thiophene Bridges |
| |
| Authors: | Quan Liu Quan‐You Feng Prof Hiroko Yamada Prof Zhong‐Sheng Wang Prof Noboru Ono Prof Xiao‐Zeng You Prof Zhen Shen |
| |
| Institution: | 1. State Key Laboratory of Coordination Chemistry, Nanjing University, 210093, Nanjing, Jiangsu (P.R. China), Fax: (+86)?25‐83314502;2. Lab of Advanced Materials, Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai, 200438 (P.R. China);3. Graduate School of Science and Engineering, Ehime University, 2‐5 Bunkyo‐cho, Matsuyama 790‐0853 (Japan);4. Present address: Graduate School of Material Science Nara Institute of Science and Technology and CREST, JST 8916‐5, Takayama‐cho, Ikoma, Nara 630‐0192 (Japan) |
| |
| Abstract: | The ring‐fused thiophene derivatives benzoc]thiophene and its precursor bicyclo2.2.2]octadiene (BCOD) have been introduced as π‐conjugated spacers for organic push–pull sensitizers with dihexyloxy‐substituted triphenylamine as donor and cyanoacrylic acid as acceptor ( OL1 , OL2 , OL3 , OL4 , OL5 , OL6 ). The effects of the fused ring on the spectroscopic and electrochemical properties of these sensitizers and their photovoltaic performance in dye‐sensitized solar cells have been evaluated. Introduction of a binary benzoc]thiophene and ethylenedioxy thiophene as π bridge caused a significant red shift of the characteristic intramolecular charge‐transfer band to 642 nm. It is found that the sensitizer OL3 , which contains one benzoc]thiophene unit as π linker, gives the highest overall conversion efficiency of 5.03 % among all these dyes. |
| |
| Keywords: | charge transfer donor– acceptor systems dye‐sensitized solar cells dyes/pigments thiophenes |
|
|
