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3 Aug 2009

Volume 95, Issue 5, Articles (05xxxx)

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Appl. Phys. Lett. 95, 052901 (2009); http://dx.doi.org/10.1063/1.3190518 (3 pages)

Didit Yudistira, Sarah Benchabane, Davide Janner, and Valerio Pruneri
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Quinoxaline-based π-conjugated donor polymer for highly efficient organic thin-film solar cells

Daisuke Kitazawa, Nobuhiro Watanabe, Shuhei Yamamoto, and Jun Tsukamoto

Appl. Phys. Lett. 95, 053701 (2009); http://dx.doi.org/10.1063/1.3202393 (3 pages) | Cited 27 times

Online Publication Date: 7 August 2009

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Show Abstract
A quinoxaline-based π-conjugated donor polymer, poly[2,7-(9,9-dioctylfluorene)-alt-5,5-(5′,8′-di-2-thienyl-2′,3′-diphenylquinoxaline)] (N-P7), was synthesized to achieve a high power conversion efficiency (PCE) of bulk heterojunction (BHJ)-based solar cells. The optical band-gap and highest occupied molecular orbital level of N-P7 were 1.95 and −5.37 eV, respectively. BHJ-based solar cells using N-P7 as a donor and phenyl C71 butyric acid methyl ester as an acceptor gave a PCE as high as 5.5% under AM 1.5G 100 mW/cm2 illumination. We also investigated the effects of substituent groups of quinoxaline-based polymers on the morphology of the BHJ layer.
Show PACS
84.60.Jt Photoelectric conversion
71.20.Rv Polymers and organic compounds
71.55.Ht Other nonmetals
78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
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