Triarylboron-Based Fluorescent Organic Light-Emitting Diodes with External Quantum Efficiencies Exceeding 20 %

Katsuaki Suzuki, Shosei Kubo, Katsuyuki Shizu, Tatsuya Fukushima, Atsushi Wakamiya, Yasujiro Murata, Chihaya Adachi, Hironori Kaji

Research output: Contribution to journalArticlepeer-review

213 Citations (Scopus)

Abstract

Triarylboron compounds have attracted much attention, and found wide use as functional materials because of their electron-accepting properties arising from the vacant p orbitals on the boron atoms. In this study, we design and synthesize new donor-acceptor triarylboron emitters that show thermally activated delayed fluorescence. These emitters display sky-blue to green emission and high photoluminescence quantum yields of 87-100 % in host matrices. Organic light-emitting diodes using these emitting molecules as dopants exhibit high external quantum efficiencies of 14.0-22.8 %, which originate from efficient up-conversion from triplet to singlet states and subsequent efficient radiative decay from singlet to ground states.

Original languageEnglish
Pages (from-to)15231-15235
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number50
DOIs
Publication statusPublished - Dec 7 2015

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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