Premium
P‐152: Efficient Blue Phosphorescent OLEDs Employing Novel Oligocarbazoles as High‐Triplet‐Energy Host Materials
Author(s) -
Tsai MingHan,
Hong YunHua,
Chang ChihHao,
Su HaiChing,
Wu ChungChih,
Matoliukstyte Ausra,
Simokaitiene Jurate,
Grigalevicius Saulius,
Grazulevicius Juozas V.,
Hsu ChaoPing
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785420
Subject(s) - phosphorescence , carbazole , oled , materials science , optoelectronics , host (biology) , photochemistry , chemistry , nanotechnology , optics , physics , fluorescence , ecology , layer (electronics) , biology
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.