Issue 64, 2017

Deep-red organic light-emitting diodes with stable electroluminescent spectra based on zinc complex host material

Abstract

A zinc complex host material named Zn(PPI)2 (PPI = 2-(1-phenyl-1H-phenanthro[9,10-d]imidazol-2-yl)phenol) is synthesized by an improved strategy. Combined with dopant Ir(piq)3 and Ir(pmiq)2(acac), deep-red phosphorescent organic light-emitting diodes are fabricated and investigated. The devices show a highest external quantum efficiency of 9.5% based on Ir(piq)3 and 13.1% for Ir(pmiq)2(acac). All these devices show very stable electroluminescent spectra without significant shift during current density increase. Commission Internationale de l'Eclairage coordinates of (0.68, 0.32) and (0.70, 0.30) are obtained respectively.

Graphical abstract: Deep-red organic light-emitting diodes with stable electroluminescent spectra based on zinc complex host material

Article information

Article type
Paper
Submitted
01 Jun 2017
Accepted
10 Aug 2017
First published
21 Aug 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 40533-40538

Deep-red organic light-emitting diodes with stable electroluminescent spectra based on zinc complex host material

Y. Li, X. Gao, L. Wang and G. Tu, RSC Adv., 2017, 7, 40533 DOI: 10.1039/C7RA06105F

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