Rational design of high efficiency green to deep red/near-infrared emitting materials based on isomeric donor-acceptor chromophores

Youming Zhang, Zhao Chen, Jun Song, Junjie He, Xin Wang, Jiatao Wu, Shuming Chen, Junle Qu, Wai Yeung Wong (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

A family of compounds TPA-BT-Q, TPA-pyT-N-naph, TPA-N-pyT-naph, and DPA-py-N-BT-naph with an isomeric donor-acceptor conjugation framework were designed and synthesized, and their structure-property relationships, theoretical calculations, and photophysical and electrochemical characteristics were investigated. These isomeric chromophores showed significantly different photophysical properties. Emission wavelengths spanning from the green to near-infrared region were observed in different solvents with high photoluminescence quantum yields, exceeding 90% in low polarity solvents and 44-88% in blend films. Organic light-emitting devices (OLEDs) displayed a strong electroluminescence with emission peaks at 592, 660, 630, and 580 nm; maximum current efficiencies of 7.92, 2.93, 3.56, and 15.37 cd A −1 ; maximum power efficiencies of 4.21, 1.56, 1.81, and 8.24 lm W −1 ; and maximum external quantum efficiencies of 3.15%, 2.75%, 2.66%, and 5.33% for TPA-BT-Q, TPA-pyT-N-naph, TPA-N-pyT-naph, and DPA-py-N-BT-naph doped OLEDs, respectively.

Original languageEnglish
Pages (from-to)1880-1887
Number of pages8
JournalJournal of Materials Chemistry C
Volume7
Issue number7
DOIs
Publication statusPublished - 1 Jan 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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