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5,6‐Bis(octyloxy)benzo[ c ][1,2,5]thiadiazole‐Bridged Dyes for Dye‐Sensitized Solar Cells with High Open‐Circuit Voltage Performance
Author(s) -
Chen Long,
Li Xin,
Ying Weijiang,
Zhang Xiaoyu,
Guo Fuling,
Li Jing,
Hua Jianli
Publication year - 2013
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201201424
Subject(s) - photocurrent , chemistry , dye sensitized solar cell , open circuit voltage , electrochemistry , photovoltaic system , energy conversion efficiency , linker , short circuit , thiophene , absorption (acoustics) , rhodanine , voltage , photochemistry , optoelectronics , electrode , organic chemistry , electrolyte , materials science , electrical engineering , engineering , operating system , computer science , composite material
Three new metal‐free dyes with a 5,6‐bis(octyloxy)benzo[ c ][1,2,5]thiadiazole core ( DOBT‐I–III ) have been designed and synthesized for use as DSSCs. Their absorption properties and electrochemical and photovoltaic performances have been investigated systematically. The DSSCs based on DOBT‐I–III show high open‐circuit voltages ( V oc ) of 829, 818, and 784 mV, respectively. Of the three dyes, DOBT‐III , which contains a thiophene‐bridging linker, exhibits the best photovoltaic performance: a short‐circuit photocurrent density ( J sc ) of 12.74 mA cm –2 and a fill factor ( FF ) of 0.73, which corresponds to an overall conversion efficiency of 7.29 % under standard global AM 1.5 solar conditions.