title: Crystal Organic Light-Emitting Diodes with Perfectly Oriented Non-Doped Pt-Based Emitting Layer.
abstract: Organic light-emitting diodes with external quantum efficiency of 38.8% are realized using a Pt-based thin-film emitting layer with photoluminescence quantum yield of 96% and transition dipole ratio of 93%. The emitting dipole orientation of the thin films fabricated using Pt complexes is investigated and the structural relationship between X-ray structural analysis and the structures in thin films are discussed based on quantum chemical calculations.
authors.affiliation: WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Kwon-Hyeon
authors.initials: KH
authors.lastname: Kim
authors.affiliation: Department of Chemistry and Low Carbon Energy Research Center, National Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Jia-Ling
authors.initials: JL
authors.lastname: Liao
authors.affiliation: Department of Organic Material Science and Engineering, Pusan National University, Busan, 609-755, Korea.
authors.forename: Si Woo
authors.initials: SW
authors.lastname: Lee
authors.affiliation: WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Bomi
authors.initials: B
authors.lastname: Sim
authors.affiliation: WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Chang-Ki
authors.initials: CK
authors.lastname: Moon
authors.affiliation: Instrumentation Center, National Taiwan University, Taipei, 10617, Taiwan.
authors.forename: Gene-Hsiang
authors.initials: GH
authors.lastname: Lee
authors.affiliation: Department of Organic Material Science and Engineering, Pusan National University, Busan, 609-755, Korea.
authors.forename: Hyo Jung
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Chemistry and Low Carbon Energy Research Center, National Tsing Hua University, Hsinchu, 30013, Taiwan.
authors.forename: Yun
authors.initials: Y
authors.lastname: Chi
authors.affiliation: WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea.
authors.forename: Jang-Joo
authors.initials: JJ
authors.lastname: Kim
keywords: oriented crystals; phosphorescent OLEDs; platinum complexes