title: Novel bipolar bathophenanthroline containing hosts for highly efficient phosphorescent OLEDs.
abstract: 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.
authors.affiliation: Department of Organic & Polymeric Materials, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8552, Japan.
authors.forename: Ziyi
authors.initials: Z
authors.lastname: Ge
authors.forename: Teruaki
authors.initials: T
authors.lastname: Hayakawa
authors.forename: Shinji
authors.initials: S
authors.lastname: Ando
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Ueda
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Akiike
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Miyamoto
authors.forename: Toru
authors.initials: T
authors.lastname: Kajita
authors.forename: Masa-aki
authors.initials: MA
authors.lastname: Kakimoto