High-performance blue phosphorescent OLEDs using energy transfer from exciplex.
An efficient energy transfer from an exciplex between a sulfone and an arylamine derivatives to a blue phosphorescent emitter enables OLED performances among the best, of over 50 lm W(-1) at 100 cd m(-2) . The formation of the exciplex realizes a barrier-free hole-electron recombination pathway, thereby leading to high OLED performances with an extremely low driving voltage of 2.9 V at 100 cd m(-2) .
Department of Organic Device Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan; Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan.
Yuki
Y
Seino
Hisahiro
H
Sasabe
Yong-Jin
YJ
Pu
Junji
J
Kido
blue phosphorescent OLED; exciplex; high efficiency; low driving voltage; sulfone derivative