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김진영

Kim, Jin Young
Next Generation Energy Lab.
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Synthesis of a conjugated copolymer with benzodithiophene and benzimidazole units

Author(s)
Song, SuheeKo, Seo-JinKim, Ju AeJin, YoungeupKim, IlKim, Jin YoungSuh, Hongsuk
Issued Date
2013-05
DOI
10.1038/pj.2012.168
URI
https://scholarworks.unist.ac.kr/handle/201301/3476
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84877616515
Citation
POLYMER JOURNAL, v.45, no.5, pp.555 - 559
Abstract
new accepter unit, dimethyl-2H-benzimidazole, was prepared and utilized for the synthesis of conjugated polymers containing an electron donor-acceptor pair for organic photovoltaics (OPVs). A dimethyl-2H-benzimidazole unit was designed to replace the benzothiadiazole (BT) unit of PCDTBT. An advantage of dimethyl-2H-benzimidazole compared with the BT moiety of PCDTBT is that the solubility of the polymer is improved while the 1,2-quinoid form is maintained to lead the coplanarity of the backbone. New semiconducting copolymers with dialkoxybenzo[1,2-b:3,4-b'] dithiophene as the electron-rich unit and 2,2-dimethyl-4,7-di(2-thienyl)-2H-benzimidazole as the electron-deficient unit were synthesized by Pd(0)-catalyzed Stille coupling polymerization. The resulting P2:PC71BM device had a open circuit voltage (V-OC) value of 0.65V, a short circuit current density (J(SC)) value of 1.86mAcm(-2) and a FF value of 0.39, with a final power conversion efficiency (PCE) value of 0.47%.
Publisher
NATURE PUBLISHING GROUP
ISSN
0032-3896
Keyword (Author)
photovoltaicspolymersynthesis2H-benzimidazole
Keyword
HETEROJUNCTION SOLAR-CELLSDEVICE APPLICATIONSPHOTOVOLTAIC CELLSSMALL-MOLECULEPERFORMANCEEFFICIENCYBENZOTHIADIAZOLETRIPHENYLAMINECARBAZOLEMOBILITY

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