Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 25, Pages 16186-16191Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b01304
Keywords
blue phosphorescent organic light-emitting diode (PhOLED); efficiency; stability; small bandgap; lower driving voltage
Funding
- Natural Science Foundation of Jiangsu Province [BK20130288]
- Natural Science Foundation of China [61575136, 61307036, 21202114]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Collaborative Innovation Center of Suzhou Nano Science and Technology
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Blue phosphorescent organic light-emitting diode (PhOLED) with a high maximum external quantum efficiency (EQE) of 26.6% was achieved using a new material, 2,8-bis (9,9-dim ethylacridin-10 (9H)-yl) dibenzo[b,d]furan (DBF-DMS) with a small bandgap, as the host. The device with DBF-DMS showed improved performance compared with that with 1,3-di-9-carbazolylbenzene, which is ascribed to the enhancement in carrier injection and transporting abilities and material stability of DBF-DMS. A lifetime of more than 100 h (time to 50% of the initial luminance, 1000 cd/m(2) with an EQE of 19.6%) in the other DBF-DMS-based device is obtained by further utilizing better device structure. This is a report indicating that host material with a small bandgap like DBF-DMS can be successfully utilized toward blue PhOLEDs with high performance.
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