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Characterization of white electroluminescent devices fabricated using conjugated polymer blends

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Abstract

We report the characterization of white light emitting devices fabricated using conjugated polymer blends. Blue emissive poly[9,9-bis(4′-n-octyloxyphenyl)fluorene-2,7-diyl-co-10-(2′-ethylhexyl)phenothiazine-3,7-diyl] [poly(BOPF-co-PTZ)] and red emissive poly(2-(2′-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene) (MEH-PPV) were used in the blends. The inefficient energy transfer between these blue and red light emitting polymers (previously deduced from the photoluminscence (PL) spectra of the blend films) enables the production of white light emission through control of the blend ratio. The PL and electroluminescence (EL) emission spectra of the blend systems were found to vary with the blend ratio. The EL devices were fabricated in the indium tin oxide [poly(3,4-ethylenedioxy-thiophene)-poly(styrenesulfonate)] (ITO/PEDOT-PSS)blend/LiF/Al configuration, and white light emission was obtained for one of the tested blend ratios.

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Authors and Affiliations

  1. Department of Applied Chemistry, Kumoh National Institute of Technology, 730-701, Kumi, Korea

    Do-Hoon Hwang, Moo-Jin Park & Suk-Kyung Kim

  2. Department of Physics, Inha University, 402-751, Incheon, Korea

    Nam-Heon Lee

  3. School of Electrical Engineering and Computer Science, Seoul National University, 151-744, Seoul, Korea

    Changhee Lee

  4. Liquid Crystal Research Center, Department of Chemistry, Kon-Kuk University, 143-701, Seoul, Korea

    Yong-Bae Kim

  5. Center for Advanced Functional Polymers, Department of Chemistry and School of Molecular Science (BK21), Korea Advanced Institute of Science and Technology, 305-701, Taejon, Korea

    Hong-Ku Shim

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  1. Do-Hoon Hwang
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  2. Moo-Jin Park
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  3. Suk-Kyung Kim
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  4. Nam-Heon Lee
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  5. Changhee Lee
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  7. Hong-Ku Shim
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Correspondence to Do-Hoon Hwang.

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Hwang, DH., Park, MJ., Kim, SK. et al. Characterization of white electroluminescent devices fabricated using conjugated polymer blends. Journal of Materials Research 19, 2081–2086 (2004). https://doi.org/10.1557/JMR.2004.0261

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  • DOI: https://doi.org/10.1557/JMR.2004.0261

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