Iridium(III) bis[2-(2-naphthyl)pyridine] (acetylacetonate)-based yellow and white phosphorescent organic light-emitting devices

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Shiu-Lun Lai
  • Si-Lu Tao
  • Mei-Yee Chan
  • Ming-Fai Lo
  • Tsz-Wai Ng
  • Shuit-Tong Lee
  • Wei-Ming Zhao

Detail(s)

Original languageEnglish
Pages (from-to)4983-4988
Journal / PublicationJournal of Materials Chemistry
Volume21
Issue number13
Publication statusPublished - 7 Apr 2011

Abstract

We report the synthesis of a new biscyclometalated yellow phosphorescent dopant iridium(iii) bis[2-(2-naphthyl)pyridine](acetylacetonate) (Ir(npy) 2acac) and studies of its application in organic light-emitting devices (OLEDs), in which highly efficient yellow-emitting OLEDs with high peak forward viewing efficiencies of 34 cd A-1, 22 lm W-1, and 11% can be obtained, along with the Commission de L'Eclairage 1931 chromaticity coordinates of (0.45, 0.54). More importantly, yellow phosphorescence can be achieved without the formation of excimer emission. Particularly, such devices exhibit a very broad and featureless peak at ca. 550 nm with a wide full spectral width at half maximum (FWHM) of 87 nm. Furthermore, combination with iridium(iii) bis[(3,4,5,-trifluorophenyl)-pyridinato-N,C2′] picolinate doped p-bis-(triphenylsilyly)benzene as the blue-emitting layer yields highly efficient white OLEDs with maximum efficiencies as high as 46 cd A-1 and 41 lm W-1 in the forward direction, making Ir(npy)2acac a promising organic phosphor for applications in yellow and white OLEDs. © The Royal Society of Chemistry 2011.

Citation Format(s)

Iridium(III) bis[2-(2-naphthyl)pyridine] (acetylacetonate)-based yellow and white phosphorescent organic light-emitting devices. / Lai, Shiu-Lun; Tao, Si-Lu; Chan, Mei-Yee; Lo, Ming-Fai; Ng, Tsz-Wai; Lee, Shuit-Tong; Zhao, Wei-Ming; Lee, Chun-Sing.

In: Journal of Materials Chemistry, Vol. 21, No. 13, 07.04.2011, p. 4983-4988.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review