Issue 17, 2015

A high-efficiency hybrid white organic light-emitting diode enabled by a new blue fluorophor

Abstract

A new efficient blue fluorophor 4-(4-diphenylaminophenyl)diphenylsulfone (SOTPA), with high triplet energy and balanced charge-transporting properties, has been designed and synthesized, and showed impressive performance both as blue emitter and as a host for phosphors. A green phosphorescent device containing SOTPA as host showed a maximum external quantum efficiency (EQE) as high as 19.2%, suggesting almost complete triplet harvesting from the blue fluorophor by the green phosphor. Single-emitting layer (EML) F–P hybrid white organic light-emitting devices (WOLEDs) based on SOTPA also gave outstanding electroluminescence performance, with a low turn-on voltage of 2.7 V and maximum EQE and power efficiency (PE) of 15.4% and 40.2 lm W−1, respectively. Even at a practical brightness of 1000 cd m−2 the PE still remained as high as 24.1 lm W−1. This excellent performance represents the highest efficiency yet reported among single-EML F–P hybrid WOLEDs.

Graphical abstract: A high-efficiency hybrid white organic light-emitting diode enabled by a new blue fluorophor

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2015
Accepted
13 Mar 2015
First published
16 Mar 2015

J. Mater. Chem. C, 2015,3, 4283-4289

A high-efficiency hybrid white organic light-emitting diode enabled by a new blue fluorophor

Z. Chen, X. Liu, C. Zheng, J. Ye, X. Li, F. Li, X. Ou and X. Zhang, J. Mater. Chem. C, 2015, 3, 4283 DOI: 10.1039/C5TC00285K

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