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New Organic Dyes Based on Biarylmethylene‐Bridged Triphenylamine for Dye Sensitized Solar Cell
Author(s) -
Wu Fei,
Liu Haitao,
Lee Lawrence Tien Lin,
Chen Tao,
Wang Min,
Zhu Linna
Publication year - 2015
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500137
Subject(s) - triphenylamine , chemistry , acceptor , photochemistry , electrochemistry , energy conversion efficiency , dye sensitized solar cell , dielectric spectroscopy , electron acceptor , solar cell , organic solar cell , organic chemistry , electrode , optoelectronics , materials science , physics , electrolyte , condensed matter physics , polymer
Three new organic dyes were synthesized and characterized for applications in dye‐sensitized solar cells (DSSCs). In these dyes, diarylmethylene‐bridged triphenylamine is the donor, and different acceptors and vinylthiophene 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 favorable for improving light harvesting ability of TBA‐2. In addition, the electrochemical impedance spectroscopy experiments suggest larger R rec and longer electron lifetime of TBA‐2. Therefore, it outperforms the other dyes, exhibiting the highest power conversion efficiency of 3.87%, with J sc of 8.25 mA·cm −2 and V oc of 666 mV. Unfortunately, the TBA‐3 with three acceptor groups only shows efficiency of 3.52%, indicating that the design of increasing acceptor groups plays little role on enhancing the solar cell efficiency.