title: Highly efficient bilayer interface exciplex for yellow organic light-emitting diode.
abstract: A simple three-layer interfacial-type yellow emission exciplex device with an external quantum efficiency as high as 7.7% has been successfully achieved by combining conformation compatible C3-symmetric hole-transporting TCTA and electron-transporting 3P-T2T. The excellent and balanced charge-transporting properties of TCTA and 3P-T2T and the large energy-levels offset (0.8 eV) of TCTA/3P-T2T interface play important roles for the efficient exciplexes formation, which are effectively confined around the interfacial region due to the high triplet energies (2.85 eV) of TCTA and 3P-T2T. The high-performance OLED was believed to be from the effective harvest of exciplex triplet excitons via reverse intersystem crossing process.
authors.affiliation: Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 20224, Taiwan. wenhung@mail.ntou.edu.tw
authors.forename: Wen-Yi
authors.initials: WY
authors.lastname: Hung
authors.forename: Guan-Cheng
authors.initials: GC
authors.lastname: Fang
authors.forename: Yuh-Chia
authors.initials: YC
authors.lastname: Chang
authors.forename: Ting-Yi
authors.initials: TY
authors.lastname: Kuo
authors.forename: Pi-Tai
authors.initials: PT
authors.lastname: Chou
authors.forename: Shih-Wei
authors.initials: SW
authors.lastname: Lin
authors.forename: Ken-Tsung
authors.initials: KT
authors.lastname: Wong