Interfacial triplet confinement for achieving efficient solution-processed deep-blue and white electrophosphorescent devices with underestimated poly(N-vinylcarbazole) as the host

Baohua Zhang, Lihui Liu, Guiping Tan, Bing Yao, Cheuk Lam Ho, Shumeng Wang, Junqiao Ding, Zhiyuan Xie, Wai Yeung Wong, Lixiang Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)

Abstract

Highly efficient deep-blue and white PhOLEDs with FIr6 as a blue emitter and PVK as a host are developed by using a high triplet level interfacial layer to confine triplet excitons within the emissive layer. Incorporation of an interfacial layer with a higher triplet level such as TPCz can effectively cut off the potential loss pathways of the triplet excitons within the PVK:FIr6 emissive layer. The resultant PVK:FIr6-based deep-blue and white solution-processed PhOLEDs exhibit an unprecedented forward-viewing EQE of 16.1% and a total EQE of 28.0% (38.4 lm W-1) at a practical luminance of 1000 cd m-2, respectively.
Original languageEnglish
Pages (from-to)4933-4939
Number of pages7
JournalJournal of Materials Chemistry C
Volume1
Issue number32
DOIs
Publication statusPublished - 4 Sep 2013
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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