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Trisdibenzofuran derived electron transport type exciton blocking materials for improved efficiency and lifetime in blue phosphorescent organic light-emitting diodes

Abstract

Two trisdibenzofuran derived compounds, 4,2':8',4''-terdibenzo[b,d]furan (TDBF) and [4,2':8',4''-terdibenzo[b,d]furan]-6,6''-dicarbonitrile (CNTDBF), were developed and investigated as electron transport type exciton blocking materials of blue phosphorescent organic light-emitting diodes (PhOLEDs). The TDBF was a trisdibenzofuran type material without any substituent, and the CNTDBF was a CN modified trisdibenzofuran type material. The introduction of the trisdibenzofuran core provided high triplet energy over 2.78 eV for use as an exciton blocking material in blue PhOLEDs and the additional CN modification of the trisdibenzofuran moiety was effective for improved electron injection, electron transport, thermal stability and extension of the driving lifetime of blue PhOLEDs. Among the two materials, the CNTDBF provided low driving voltage, high quantum efficiency, low efficiency roll-off and extended lifetime.

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Publication details

The article was received on 25 Jul 2017, accepted on 07 Dec 2017 and first published on 07 Dec 2017


Article type: Paper
DOI: 10.1039/C7TC03336B
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Trisdibenzofuran derived electron transport type exciton blocking materials for improved efficiency and lifetime in blue phosphorescent organic light-emitting diodes

    J. H. Yun, Y. J. Kang, S. H. Han and J. Y. Lee, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03336B

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