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Issue 2, 2012
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Highly efficient single-layer white polymer light-emitting devices employing triphenylamine-based iridium dendritic complexes as orange emissive component

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Abstract

New triphenylamine-based iridium(III) dendritic complexes are demonstrated as active components for white polymer light-emitting diodes (WPLEDs). Initially the orange PLEDs are fabricated through dispersing the dendrimers into PVK in the presence of an electron-transport material 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole (PBD). High performance of orange PLEDs is acquired by use of the low-conductivity anode buffer layer P8000, with the maximum current/power/external quantum efficiencies of 52.4 cd A−1/21.6 lm W−1/21.0%. Based on the excellent performance of the orange PLEDs, single-layer white polymer light-emitting devices (WPLEDs) are fabricated by double-doping sky-blue emitter iridium(III) bis(2-(4,6-difluorophenyl)-pyridinato-N,C2)picolinate (FIrpic) and the orange iridium dendrimers. These WPLEDs achieve the maximum current/power/external quantum efficiencies of 37.0 cd A−1/19.4 lm W−1/18.5%, which are among the highest efficiencies for dual-color WPLEDs ever reported. This work presents a premiere attempt on applying dendritic phosphor in highly efficient all-phosphor WPLEDs and a step forward to panchromatic application of Ir(III) dendrimers.

Graphical abstract: Highly efficient single-layer white polymer light-emitting devices employing triphenylamine-based iridium dendritic complexes as orange emissive component

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Publication details

The article was received on 18 Jul 2011, accepted on 07 Sep 2011 and first published on 27 Oct 2011


Article type: Paper
DOI: 10.1039/C1JM13387J
J. Mater. Chem., 2012,22, 361-366

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    Highly efficient single-layer white polymer light-emitting devices employing triphenylamine-based iridium dendritic complexes as orange emissive component

    M. Zhu, J. Zou, S. Hu, C. Li, C. Yang, H. Wu, J. Qin and Y. Cao, J. Mater. Chem., 2012, 22, 361
    DOI: 10.1039/C1JM13387J

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