Synthesis of novel thiophene-phenylene oligomer derivatives with a dibenzothiophene-5,5-dioxide core for use in organic solar cells

A novel donor–acceptor–donor oligomer, 3,7‐bis[5‐(4‐n‐hexylphenyl)‐2‐thienyl]dibenzothiophene‐5,5‐dioxide (37HPTDBTSO) with a dibenzothiophene‐5,5‐dioxide core and end‐cap phenylene–thiophene moieties, was synthesized using Stille cross‐coupling reactions. The functional properties, including the op...

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Bibliographic Details
Published in:physica status solidi (b) 2012-12, Vol.249 (12), p.2648-2651
Main Authors: Fujii, Shunjiro, Duan, Zongfan, Okukawa, Takanori, Yanagi, Yuichiro, Yoshida, Akira, Tanaka, Takeshi, Zhao, Gaoyang, Nishioka, Yasushiro, Kataura, Hiromichi
Format: Article
Language:English
Subjects:
bulk-heterojunction solar cells
oligomer
oligomeric phenylene-thiophene derivative
organic solar cells
PCBM
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Summary:A novel donor–acceptor–donor oligomer, 3,7‐bis[5‐(4‐n‐hexylphenyl)‐2‐thienyl]dibenzothiophene‐5,5‐dioxide (37HPTDBTSO) with a dibenzothiophene‐5,5‐dioxide core and end‐cap phenylene–thiophene moieties, was synthesized using Stille cross‐coupling reactions. The functional properties, including the optical and electrochemical properties, were investigated. Using 37HPTDBTSO and phenyl‐C61‐butyric acid methyl ester (PCBM) as a photoactive layer, bulk‐heterojunction solar cell devices were fabricated by a spin‐coating technique. 37HPTDBTSO was found to be a valuable electron donor. The device had a high open circuit voltage of 0.85 V and the highest power conversion efficiency of 0.84% when the weight ratio of 37HPTDBTSO to PCBM was 1:1.5. These results indicate that the new oligomer is a promising solution‐processable photovoltaic material.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201200439