Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74362
Title: Novel iridium(III) complexes bearing dimesitylboron groups with nearly 100% phosphorescent quantum yields for highly efficient organic light-emitting diodes
Authors: Liu, B
Dang, F
Feng, Z
Tian, Z
Zhao, J
Wu, Y
Yang, X
Zhou, G
Wu, Z
Wong, WY 
Issue Date: 2017
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry C, 2017, v. 5, no. 31, p. 7871-7883 How to cite?
Journal: Journal of materials chemistry C 
Abstract: A series of cyclometalated iridium(iii) complexes, Ir-B-1, Ir-B-2, Ir-B-3, and Ir-B-4, were synthesized with the 2-phenylpyridine (ppy) type main ligand possessing a dimesitylboron group and the auxiliary ligand containing other main-group element units showing unique charge injection/transporting features. Their thermal stability, photophysical and electrochemical properties, and electroluminescent (EL) performances have been characterized. Time-dependent density functional theory (TD-DFT) calculations were carried out to study the photophysical properties of these complexes. All these complexes can emit intense orange phosphorescence with extremely high quantum yields of nearly 100% measured in neat films at room temperature. Moreover, the solution-processed organic light-emitting devices (OLEDs) using these complexes as orange emitters can show very high EL efficiencies with the maximum luminance efficiency (ηL) of 85.1 cd A-1, corresponding to a power efficiency (ηP) of 69.7 lm W-1 and an external quantum efficiency (ηext) of 28.1%.
URI: http://hdl.handle.net/10397/74362
ISSN: 2050-7534
EISSN: 2050-7534
DOI: 10.1039/c7tc02369c
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