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

Abstract

A family of compounds TPA-BT-Q, TPA-pyT-N-naph, TPA-N-pyT-naph, and DPA-py-N-BT-naph with the 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 green to near-infrared region were observed in different solvents with high photoluminescence quantum yield, exceeding 90% in low polarity solvents and 44–88% in blend films. Organic light-emitting devices displayed 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; maximum power efficiencies of 4.21, 1.56, 1.81, and 8.24 lm/W; 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.

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Publication details

The article was received on 25 Oct 2018, accepted on 30 Dec 2018 and first published on 31 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC05383A
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Rational design of high efficiency green to deep red/near-infrared emitting materials based on isomeric donor-acceptor chromophores

    W. R. Wong, Y. Zhang, Z. Chen, J. Song, J. He, X. Wang, J. Wiu, S. Chen and J. Qu, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC05383A

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