title: Spiro-configured bifluorenes: highly efficient emitter for UV organic light-emitting device and host material for red electrophosphorescence.
abstract: [structure: see text] Remarkable UV OLED devices using novel spiro-configured bifluorenes as UV emitters have been successfully achieved with external quantum efficiencies up to 2.6-3.1% and emission wavelengths as short as 370 nm. In addition, these large-gap materials have been shown to be effective hosts for red phosphorescent emitters in phosphorescent OLEDs. This result represents the first example that pure hydrocarbon molecules can serve as an efficient host for red electrophosphorescence devices.
authors.affiliation: Department of Chemistry, Graduate Institute of Electro-optical Engineering and Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 106, Taiwan. kenwong@ntu.edu.tw
authors.forename: Ken-Tsung
authors.initials: KT
authors.lastname: Wong
authors.forename: Yuan-Li
authors.initials: YL
authors.lastname: Liao
authors.forename: Yu-Ting
authors.initials: YT
authors.lastname: Lin
authors.forename: Hai-Ching
authors.initials: HC
authors.lastname: Su
authors.forename: Chung-chih
authors.initials: CC
authors.lastname: Wu