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Highly efficient dual-core derivatives with EQEs as high as 8.38% at high brightness for OLED blue emitters

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Abstract

Three blue fluorescent materials were newly synthesized by attaching triphenylamine side groups at their ortho, meta, and para positions to a dual core moiety of anthracene and pyrene, two chromophores with good luminous efficiency; these three materials were 2-(6-(10-(2-(diphenylamino)phenyl)anthracen-9-yl)pyren-1-yl)-N,N-diphenylaniline (o-TPA-AP-TPA), 3-(6-(10-(3-(diphenylamino)phenyl)anthracen-9-yl)pyren-1-yl)-N,N-diphenylaniline (m-TPA-AP-TPA), and 4-(6-(10-(4-(diphenylamino)phenyl)anthracen-9-yl)pyren-1-yl)-N,N-diphenylaniline (p-TPA-AP-TPA), respectively. The optical, thermal, and electroluminescence (EL) properties of the synthesized materials were measured. All three materials were found to be real blue emitters in the solution state and display high PLQY values. A device doped with p-TPA-AP-TPA displayed a very high efficiency of 9.14 cd A−1 and an EQE of 8.38% at a high luminance of 5000 cd m−2.

Graphical abstract: Highly efficient dual-core derivatives with EQEs as high as 8.38% at high brightness for OLED blue emitters

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Publication details

The article was received on 20 Aug 2019, accepted on 22 Oct 2019 and first published on 25 Oct 2019


Article type: Paper
DOI: 10.1039/C9TC04603H
J. Mater. Chem. C, 2019, Advance Article

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    Highly efficient dual-core derivatives with EQEs as high as 8.38% at high brightness for OLED blue emitters

    S. Kang, H. Jung, H. Lee, S. Park, J. Kim and J. Park, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC04603H

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