title: An ambipolar host material provides highly efficient saturated red PhOLEDs possessing simple device structures.
abstract: A highly efficient red electrophosphorescent device exhibited saturated red emission and an impressive external quantum efficiency [eta(ext) = 10.8% (ph/el)] with simple device configuration of doping an iridium complex (Mpq(2)Iracac) into a novel ambipolar spiro-configured donor-acceptor host material (D2ACN) has been developed.
authors.affiliation: Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, Taiwan 202. wenhung@mail.ntou.edu.tw
authors.forename: Wen-Yi
authors.initials: WY
authors.lastname: Hung
authors.forename: Tsung-Cheng
authors.initials: TC
authors.lastname: Tsai
authors.forename: Sung-Yu
authors.initials: SY
authors.lastname: Ku
authors.forename: Liang-Chen
authors.initials: LC
authors.lastname: Chi
authors.forename: Ken-Tsung
authors.initials: KT
authors.lastname: Wong