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Tuning the Spectroscopic, Electrochemical, and Photovoltaic Properties of Triaryl Amine Based Sensitizers through Ring‐Fused Thiophene Bridges
Author(s) -
Liu Quan,
Feng QuanYou,
Yamada Hiroko,
Wang ZhongSheng,
Ono Noboru,
You XiaoZeng,
Shen Zhen
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201100748
Subject(s) - thiophene , triphenylamine , photochemistry , intramolecular force , chemistry , conjugated system , dye sensitized solar cell , ring (chemistry) , electrochemistry , acceptor , materials science , organic chemistry , polymer , electrolyte , condensed matter physics , physics , electrode
The ring‐fused thiophene derivatives benzo[ c ]thiophene and its precursor bicyclo[2.2.2]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 benzo[ c ]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 benzo[ c ]thiophene unit as π linker, gives the highest overall conversion efficiency of 5.03 % among all these dyes.
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