Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence oleds exhibiting high efficiency and low roll-off

Mallesham Godumala, Jiwon Yoon, Chiho Lee, Ji Eun Jeong, Sungnam Park, Han Young Woo, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m-2 and 1000 cd m-2, respectively, demonstrating very small roll-off.

Original languageEnglish
Pages (from-to)12952-12955
Number of pages4
JournalChemical Communications
Volume55
Issue number86
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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