Efficient blue phosphorescent OLEDs employing novel oligocarbazoles as high-triplet-energy host materials
Journal
Digest of Technical Papers - SID International Symposium
Journal Volume
38
Journal Issue
1
Pages
772-775
Date Issued
2007
Author(s)
Tsai, M.-H.
Hong, Y.-H.
Chang, C.-H.
Su, H.-C.
Wu, C.-C.
Matoliukstyte, A.
Simokaitiene, J.
Grigalevicius, S.
Grazulevicius, J.V.
Hsu, C.-P.
Abstract
Abstract A series of 3(6),9′‐linked oligocarbazoles with large triplet energies and morphological stability are reported as host materials for electrophosphorescence. In such oligocarbazoles, the triplet excitation is confined within one carbazole unit, leading to a new molecular design strategy for large‐triplet‐energy and high morphological stability hosts. Using these hosts, efficient blue phosphorescent OLEDs having efficiencies up to 15%, 31 cd/A and 28 lm/W are demonstrated.
SDGs
Type
conference paper