High efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture
Journal Article
·
· Applied Physics Letters, 97:033304
We report high efficiency and low roll-off for blue electrophosphorescent organic light emitting devices (OLEDs) based on a mixed host layer architecture. The devices were fabricated using a mixed layer of di-[4-(N,N-ditolyl-amino)-phenyl]cyclohexane (TAPC), a hole transport material, and 2,8-bis(diphenylphosphoryl)dibenzothiophene (PO15), an electron transport material, as the host layer doped with the blue phosphor iridium (III) bis[(4,6-difluorophenyl)-pyridinato-N,C2’]picolinate (FIrpic). Using a mixed layer as the host allowed us to achieve high power efficiency (59 lm/W at 100 cd/m2), low turn-on voltage (2.7 V for >10 cd/m2), and low roll-off in these devices.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 991568
- Report Number(s):
- PNNL-SA-71085; 35598; 830403000
- Journal Information:
- Applied Physics Letters, 97:033304, Journal Name: Applied Physics Letters, 97:033304 Journal Issue: 3 Vol. 97; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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