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Organic dyes containing nonsubstituted aryl amino moieties and azobenzene units for dye‐sensitized solar cells
Author(s) -
Toan Nguyen Duc,
Chiu Kuo Yuan,
Tran Thai Thi Ha,
Yang TeFang,
Su Yuhlong Oliver
Publication year - 2019
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201900204
Subject(s) - chemistry , bathochromic shift , moiety , azobenzene , dye sensitized solar cell , photochemistry , carbazole , aryl , absorption spectroscopy , homo/lumo , absorption (acoustics) , energy conversion efficiency , alkoxy group , polymer chemistry , alkyl , stereochemistry , organic chemistry , molecule , fluorescence , optoelectronics , optics , materials science , physics , electrode , electrolyte
A series of novel sensitizers were successfully synthesized utilizing azobenzene as a π‐linkage unit for the D–π–A structure. A slight red shift on the absorption spectra and λ onset of the sensitizers could be observed when the thienyl group was introduced to the acceptor moiety (A). In addition, replacing the donor moiety (D) from carbazole to diarylamino could lead to a negative shift (approximately 0.3 V) in the first oxidation potential. DFT calculation was also carried out and the trend of calculated HOMO–LUMO gaps was consistent to the experimental data obtained from the CV results ( DT1 < DT2 < DT3 < DT4 ). These sensitizers were then employed in dye‐sensitized solar cells to investigate their photovoltaic performances. Highest power conversion efficiency (PCE) of 0.84% was achieved for DT1 ‐based DSSC according to its most bathochromic absorption spectrum.