White polymer light-emitting devices from ternary-polymer blend with concentration gradient

Jong Hyeok Park, Tae Woo Lee, Young Chul Kim, O. Ok Park, Jai Kyeong Kim

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


We have fabricated a white polymer light-emitting-diode bilayer structure that contains a ternary polymer blend. The first layer of poly(9-vinylcarbazole) acts as an energy donor and electron blocker, and the second layer comprising an immiscible polymer blend of two light-emitting polymers, poly(9,9′- dihexylfluorene-2,7-divinylene-m-phenylenevinylene-stat-p-phenylenevinylene) and poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylenevinylene), emits light. The emissive white color of the device was observed to be practically independent of the driving voltage (near CIE coordinate; 0.33, 0.33). In addition, it shows greatly enhanced luminous efficiency compared to a ternary blended white light-emitting-diode.

Original languageEnglish
Pages (from-to)293-297
Number of pages5
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - 2005 Feb 25

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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