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Acceptor blending ratio dependence of bulk heterojunction organic photovoltaic devices

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Abstract

Bulk heterojunction (BHJ) organic photovoltaic (OPV) devices are generally composed of a blend film of a π-conjugated polymeric electron donor and a C60 derivative electron acceptor intercalated between an anode and a cathode, typical of a two-dimensional device structure. Often, a regioregular poly(3-hexylthiophene) (rr-P3HT) and indene-C60 bisadduct (ICBA) blend film is used as the BHJ active layer instead of the conventional P3HT and phenyl-C61-butyric acid methyl ester (PCBM) blend film due to the ICBA device’s higher power conversion efficiency (PCE), which is correlated with its higher open-circuit voltage (V OC ). To determine the quantitative influences of those electron acceptors in the BHJ OPV devices, we prepared various devices of acceptors, either PCBM or ICBA, with a wide range of blending ratios (from 0 to 100%) for estimating their typical optoelectronic properties, e.g., UV-visible absorption spectra, photoluminescence intensity, surface morphology, and photovoltaic device parameters. Obtained data were compared to each other and were analyzed as a function of their acceptor blending ratio.

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Authors and Affiliations

  1. Department of Chemistry, Konkuk University, Seoul, 143-701, Korea

    Haebong Yi & Chan Im

  2. Konkuk University — Fraunhofer Institute for Solar Energy Systems Next Generation Solar Cell Research Center (KFnSC), Konkuk University, Seoul, 143-701, Korea

    Jongdeok An, Sunae Lee & Hoon Park

Authors
  1. Haebong Yi
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  2. Chan Im
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  3. Jongdeok An
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  4. Sunae Lee
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  5. Hoon Park
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Correspondence to Chan Im.

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Yi, H., Im, C., An, J. et al. Acceptor blending ratio dependence of bulk heterojunction organic photovoltaic devices. Journal of the Korean Physical Society 64, 910–916 (2014). https://doi.org/10.3938/jkps.64.910

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  • DOI: https://doi.org/10.3938/jkps.64.910

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