Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 1, Issue 25, Pages 3967-3975Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc30410h
Keywords
-
Funding
- Natural Science Foundation of China [21202114, 21161160446, 61036009, 61177016]
- National High-Tech Research Development Program [2011AA03A110]
- Natural Science Foundation of Jiangsu Province [BK2010003]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Research Supporting Program of Suzhou Industrial Park
Ask authors/readers for more resources
A series of novel blue phosphorescent host materials, namely, CTP-1, CTP-2 and CTP-3 have been designed and synthesized through the Suzuki-Miyaura cross-coupling reaction between N-phenylcarbazole and biphenyl. Their thermal, photophysical and electrochemical properties were systematically investigated. These novel hosts show excellent thermal stability and high glass transition temperatures (T-g) ranging from 113 to 127 degrees C. The triplet energies of these three materials are significantly higher than that of (4,4'-bis(N-carbazolyl)-2,2'-biphenyl) (CBP, 2.56 eV) and that of the most popular blue phosphorescent material iridium(III) bis[(4,6-difluorophenyl)pyridinato-N,C-2'] picolinate (Flrpic, 2.65 eV). These three novel materials have superior thermal and electronic properties for blue and white phosphorescent OLEDs. Blue emitting devices with an Ir-complex Flrpic as the phosphorescent dopant have been fabricated and show high efficiency with low roll-off. In particular, 40.4 cd A(-1) at 100 cd m(-2) and 38.2 cd A(-1) at 1000 cd m(-2) were achieved when CTP-1 was used as the host material. On the basis of this work, an all-phosphor white device with a current efficiency of 64.5 cd A(-1) at 100 cd m(-2) and 61.9 cd A(-1) at 1000 cd m(-2) has also been fabricated.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available