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Application of the Organic Photosensitizers Bearing Two Carboxylic Acid Groups to Dye‐Sensitized Solar Cells
Author(s) -
ZHANG XueHua,
YAO YiShan,
LI Chao,
WANG WeiBo,
CHENG XueXin,
WANG XueSong,
ZHANG BaoWen
Publication year - 2008
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.200890170
Subject(s) - triphenylamine , chemistry , photocurrent , dye sensitized solar cell , photochemistry , rhodanine , electron acceptor , acceptor , electron donor , intramolecular force , optoelectronics , organic chemistry , electrolyte , physics , electrode , condensed matter physics , catalysis
Three electron donor‐ bridge‐electron acceptor (D‐π‐A) organic dyes bearing two carboxylic acid groups were applied to dye‐sensitized solar cells (DSSC) as sensitizers, in which one triphenylamine or modified triphenylamine and two rhodanine‐3‐acetic acid fragments act as D and A, respectively. It was found that the introduction of t ‐butyl or methoxy group in the triphenylamine subunit could lead to more efficient photoinduced intramolecular charge transfer, thus improving the overall photoelectric conversion efficiency of the resultant DSSC. Under global AM 1.5 solar irradiation (73 mW·cm −2 ), the dye molecule based on methoxy‐substituted triphenylamine achieved the best photovoltaic performance: a short circuit photocurrent density ( J sc ) of 12.63 mA·cm −2 , an open circuit voltage ( V oc ) of 0.55 V, a fill factor (FF) of 0.62, corresponding to an overall efficiency ( η ) of 5.9%.