期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 46, 页码 40497-40502出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b09172
关键词
blue phosphor; carbene; iridium; organic light-emitting diode; single-doped OLED
资金
- Hong Kong Research Grants Council [HKBU 12304715, HKBU 12317216]
- Areas of Excellence Scheme of the University Grants Committee HKSAR [AoE/P-03/08]
- Hong Kong Polytechnic University [1-ZE1C]
- National Natural Science Foundation of China [21504074]
- Hong Kong Baptist University [FRG2/15-16/074, RC-ICRS/14-15/02]
- Science, Technology and Innovation Committee of Shenzhen Municipality [JCYJ20160531193836532]
Five deep blue carbene-based iridium(III) phosphors were synthesized and characterized. Interestingly, one of them can be fabricated into deep blue, sky blue and white organic light-emitting diodes (OLEDs) through changing the host materials and exciton blocking layers. These deep and sky blue devices exhibit Commission Internationale de 1'Eclairage (CIE) coordinates of (0.145, 0.186) and (0.152, 0.277) with external quantum efficiency (EQE) of 15.2% and 9.6%, respectively. The EQE of the deep blue device can be further improved up to 19.0% by choosing a host with suitable energy level of its lowest unoccupied molecular orbital (LUMO).
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