Cyclometalated Iridium(III) Carbene Phosphors for Highly Efficient Blue Organic Light-Emitting Diodes

Zhao Chen, Liqi Wang, Sikai Su, Xingyu Zheng, Nianyong Zhu, Cheuk Lam Ho, Shuming Chen, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

49 Citations (Scopus)

Abstract

Five deep blue carbene-based iridium(III) phosphors were synthesized and characterized. Interestingly, one of them can be fabricated into deep blue, sky blue and white organic light-emitting diodes (OLEDs) through changing the host materials and exciton blocking layers. These deep and sky blue devices exhibit Commission Internationale de l′éclairage (CIE) coordinates of (0.145, 0.186) and (0.152, 0.277) with external quantum efficiency (EQE) of 15.2% and 9.6%, respectively. The EQE of the deep blue device can be further improved up to 19.0% by choosing a host with suitable energy level of its lowest unoccupied molecular orbital (LUMO).
Original languageEnglish
Pages (from-to)40497-40502
Number of pages6
JournalACS Applied Materials and Interfaces
Volume9
Issue number46
DOIs
Publication statusPublished - 22 Nov 2017

Keywords

  • blue phosphor
  • carbene
  • iridium
  • organic light-emitting diode
  • single-doped OLED

ASJC Scopus subject areas

  • Materials Science(all)

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