Multifunctional electron-transporting indolizine derivatives for highly efficient blue fluorescence, orange phosphorescence host and two-color based white OLEDs

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

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Author(s)

  • Jing Wan
  • Cai-Jun Zheng
  • Man-Keung Fung
  • Xiao-Ke Liu
  • Xiao-Hong Zhang

Detail(s)

Original languageEnglish
Pages (from-to)4502-4510
Journal / PublicationJournal of Materials Chemistry
Volume22
Issue number10
Publication statusPublished - 14 Mar 2012

Abstract

In this work, derivatives of indolizine are first used as electron-transporting host materials for hybrid fluorescence/phosphorescence white organic light-emitting devices (F/P-WOLED). Of the indolizine derivatives, a blue fluorescent material BPPI (3-(4,4′-biphenyl)-2-diphenylindolizine) was found to have: (1) blue emission with high quantum yields, (2) good morphological and thermal stabilities, (3) electron-transporting properties, and (4) a sufficiently high triplet energy level to act as a host for red or yellow-orange phosphorescent dopants. The multifunctional BPPI enables adaptation of several simplified device configurations. For example, a non-doped blue fluorescent device exhibits good performance with an external quantum efficiency of 3.16% and Commission Internationale de l'Eclairage coordinates of (0.15, 0.07). A high-performance orange phosphorescent device was found to have a high current efficiency of 23.9 cd A -1. Using BPPI, we also demonstrate a F/P-WOLED with a simplified structure, stable emissions and respectable performance (current and external quantum efficiencies of 17.8 cd A -1 and 10.7%, respectively). © 2012 The Royal Society of Chemistry.

Citation Format(s)

Multifunctional electron-transporting indolizine derivatives for highly efficient blue fluorescence, orange phosphorescence host and two-color based white OLEDs. / Wan, Jing; Zheng, Cai-Jun; Fung, Man-Keung; Liu, Xiao-Ke; Lee, Chun-Sing; Zhang, Xiao-Hong.

In: Journal of Materials Chemistry, Vol. 22, No. 10, 14.03.2012, p. 4502-4510.

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