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Efficient white polymer light-emitting diodes (WPLEDs) based on double emitting layers of a PVK:Eu(III)-complex and Alq3

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Abstract

Colour-tunable polymer light-emitting diodes (PLEDs) were realized by tuning the concentration of an Eu3+-complex in the emitting-layer (EML) and the thickness of the hole-blocking BCP layer (BCP = 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) in a double-emitting-layer (dEML) configuration. The dEML used PVK:complex 2 (PVK = poly(N-vinylcarbazole); H2Salen = N,N′-bis(salicylidene)cyclohexane-1,2-diamine and HDBM = dibenzoylmethane for [Zn(Salen)(μ-OAc)Eu(DBM)2] (2)) as EML1 and Alq3 as EML2. The efficiencies (0.32–0.39 cd A−1, 0.54–0.56% and 0.99–1.10 lm W−1) were obtained from organo-Eu3+ incorporated WPLEDs with a complex-2-doping content of 20 or 30 wt% and 20 nm BCP thickness. The WPLEDs exhibited low turn-on voltage (6.0–7.5 V) and low efficiency-roll-off, which are advantageous to organo-Eu3+ doped WOLEDs.

Graphical abstract: Efficient white polymer light-emitting diodes (WPLEDs) based on double emitting layers of a PVK:Eu(iii)-complex and Alq3

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Publication details

The article was received on 29 Dec 2018, accepted on 20 Mar 2019 and first published on 22 Mar 2019


Article type: Paper
DOI: 10.1039/C8TC06610H
Citation: J. Mater. Chem. C, 2019, Advance Article

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    Efficient white polymer light-emitting diodes (WPLEDs) based on double emitting layers of a PVK:Eu(III)-complex and Alq3

    Y. He, L. Liu, G. Fu, W. Li, X. Lü, H. He and W. Wong, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C8TC06610H

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