Unique Solid-State Emission Behavior of Aromatic Difluoroboronated β-Diketones as an Emitter in Organic Light-Emitting Devices

Hisahiro Sasabe, Kanako Sasaki, Michitaka Mamiya, Yurie Suwa, Taiki Watanabe, Natsuki Onuma, Kohei Nakao, Minoru Yamaji, Junji Kido

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Aromatic difluoroboronated β-diketone (BF2DK) derivatives are a widely known class of luminescent organic materials that exhibit high photoluminescent quantum efficiency and unique aggregation-dependent fluorescence behavior. However, there have been only a few reports on their use in solid-state electronic devices, such as organic light-emitting devices (OLEDs). Herein, we investigated the solid-state properties and OLED performance of a series of π-extended BF2DK derivatives that have previously been shown to exhibit intense fluorescence in the solution state. The BF2DK derivatives formed exciplexes with a carbazole derivative and exhibited thermally activated delayed fluorescence (TADF) behavior to give orange electroluminescence with a peak external quantum efficiency of 10 % that apparently exceeds the theoretical efficiency limit of conventional fluorescent OLEDs (7.5 %), assuming a light out-coupling factor of 30 %.

Original languageEnglish
Pages (from-to)2299-2303
Number of pages5
JournalChemistry - An Asian Journal
Volume12
Issue number17
DOIs
Publication statusPublished - Sep 5 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry

Fingerprint

Dive into the research topics of 'Unique Solid-State Emission Behavior of Aromatic Difluoroboronated β-Diketones as an Emitter in Organic Light-Emitting Devices'. Together they form a unique fingerprint.

Cite this