Novel bipolar bathophenanthroline containing hosts for highly efficient phosphorescent OLEDs.
The electronic structures of eight bathophenanthroline derivatives were elucidated by DFT calculations, and four representatives of which CZBP, m-CZBP, m-TPAP, and BPABP were synthesized and employed as the hosts to afford highly efficient phosphorescent OLEDs. The calculated molecular orbital energies agree well with the experimental results, which further demonstrates that the localization of HOMO and LUMO at the respective hole- and electron-transporting moieties is desirable in bipolar molecular designs.
Ge
Ziyi
Z
Department of Organic & Polymeric Materials, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8552, Japan.
Hayakawa
Teruaki
T
Ando
Shinji
S
Ueda
Mitsuru
M
Akiike
Toshiyuki
T
Miyamoto
Hidetoshi
H
Kajita
Toru
T
Kakimoto
Masa-aki
MA