期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 28, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202103202
关键词
800 nm; near-infrared; organic light-emitting diodes; osmium(II) complex; pyrazolo[5; 4-f]quinoxaline
资金
- City University of Hong Kong (ARG-CityU Applied Research Grant) [9667179]
- RGC program of Hong Kong, China [JLFS/P-101/18, 11300418, 11300319, ITS/196/20]
- ITF program of Hong Kong, China [JLFS/P-101/18, 11300418, 11300319, ITS/196/20]
By fusing the pyrazinyl pyrazole entity to form a pyrazolo[3,4-f]quinoxaline chelate, the Os(II) based NIR emitter exhibits efficient electroluminescence with a peak at 811 nm, a maximum external quantum efficiency of 0.97%, and a suppression of efficiency roll-off up to a current density of 300 mA cm(-2).
Upon fusing the pyrazinyl pyrazole entity in giving pyrazolo[3,4-f]quinoxaline chelate, the corresponding Os(II) based NIR emitter exhibited invisible and efficient electroluminescence with a peak maximum at 811 nm. A maximum external quantum efficiency of 0.97 % and a suppressed efficiency roll-off till a current density of 300 mA cm(-2) was also exhibited.
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