Synthesis and Characterization of New Dibenzothiophene-based Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes

Hyung Jong Kim, Ik Rang Choe, Tae Ryang Hong, Ju Sik Kang, Hyun Ah Um, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A series of bipolar host materials containing dibenzo[b,d]thiophene (DBT) or dibenzo[b,d]thiophene 5,5-dioxide core were successfully synthesized, and their physical, photophysical, and electrochemical properties were investigated. The three host materials showed well-localized electron distribution at the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) states, as evidenced by theoretical calculations. Triplet energies of the new host materials are higher than 2.6 eV, and the blend film with bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic) as a blue phosphorescent dopant showed highly efficient energy transfer between the host material and dopant.

Original languageEnglish
Pages (from-to)31-39
Number of pages9
JournalMolecular Crystals and Liquid Crystals
Volume621
Issue number1
DOIs
Publication statusPublished - 2015 Nov 2

Bibliographical note

Funding Information:
This research was supported by National Research Foundation of Korea (NRF2012R1A2A1A01008797 & 20110026418) and by Key Research Institute Program through the NRF funded by the Ministry of Education, Science and Technology (NRF20100020209).

Publisher Copyright:
Copyright © 2015 Taylor & Francis Group, LLC.

Keywords

  • bipolar host material
  • energy transfer
  • phosphorescence
  • triplet energy

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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