The facile synthesis of homoleptic phenylpyridazine iridium(III) complexes and their application in high efficiency OLEDs
authors Chen, M; Wang, LD; Wang, Y; Zhou, YY; Hu, CG; Tong, BH; Bian, ZQ; Fu, LS; Zhang, QF; Wang, P
nationality International
journal ORGANIC ELECTRONICS
author keywords Homoleptic cyclometalated iridium(III) complex; Phenylpyridazine; One-pot reaction; OLEDs
keywords LIGHT-EMITTING DIODE; PHOSPHORESCENT OLEDS; FLUORESCENCE PROPERTIES; AB-INITIO; ELECTROPHOSPHORESCENCE; LIGANDS; THERMOCHEMISTRY; CYCLOADDITION; DERIVATIVES
abstract Two one-pot methods have been used to synthesize various homoleptic phenylpyridazine iridium (III) complexes (2-4). The coordination arrangements of 2 and 3 were revealed by carrying out single X-ray structural analyses. These complexes showed green emission. Their peak wavelengths ranged from 508 to 538 nm with quantum yields greater than 70%. Density functional theory (DFT) was used to discuss the correlation between substituent nature and photophysical characteristics of these complexes. Organic light-emitting diodes (OLEDs) were fabricated by taking 2-4 as dopants. The green device based on complex 4 shows a maximum current efficiency and external quantum efficiency of 78.6 cd A(-1) and 21.9%, respectively, and mild efficiency roll-off. The results suggest that these homoleptic phenylpyridazine iridium(III) complexes have potential application as efficient emitters in OLEDs.
publisher ELSEVIER
issn 1566-1199
isbn 1878-5530
year published 2019
volume 75
digital object identifier (doi) 10.1016/j.orgel.2019.105439
web of science category Materials Science, Multidisciplinary; Physics, Applied
subject category Materials Science; Physics
unique article identifier WOS:000513179400061
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journal analysis (jcr 2019):
journal impact factor 3.31
5 year journal impact factor 3.041
category normalized journal impact factor percentile 67.663
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