High efficiency red electrophosphorescent polymer light-emitting diode

Chin Yu Chang, Sung Nien Hsieh, Ten Chin Wen, Tzung Fang Guo, Chien Hong Cheng

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


This work reports on the fabrication of an efficient polymer light-emitting device by applying iridium (Ir) complex, dibenzo[f,h]-quinoxaline iridium (acetylacetonate) [Ir(DBQ)2(acac)], as the phosphorescent dopant, poly(9-vinylcarbazole) as the matrix layer, and 2-(4-biphenylyl)-5-(4-tert- butyl-phenyl)-(1,3,4-oxadiazole) as the electron transport material. The trapping of charge carriers at the Ir(DBQ)2(acac) dopant sites dominates the electroluminescence (EL) of the devices. The device emits red electrophosphorescence centered at 610 nm, exclusively from the Ir dopant and an EL efficiency of 8.5 cd/A (1287 cd/m2) biased at 14.5 mA/cm 2.

Original languageEnglish
Pages (from-to)50-53
Number of pages4
JournalChemical Physics Letters
Issue number1-3
Publication statusPublished - 2006 Jan 25

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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