title: Highly efficient non-doped deep blue fluorescent emitters with horizontal emitting dipoles using interconnecting units between chromophores.
abstract: New deep blue fluorescent emitters composed of anthracene as an electron rich unit, a diphenyltriazine as a strong electron acceptor unit, and phenyl or xylene as interconnecting units were synthesised. The interconnecting unit between chromophores increased the singlet transition energy and the ratio of horizontal emitting dipoles. As a result, a non-doped blue fluorescent organic light-emitting diode (OLED) using a new emitter was demonstrated, with an external quantum efficiency (EQE) of 6.6% and Commision Internationale de l'Eclairage (CIE) colour coordinates of (0.145, 0.068). This device performance has been the highest EQE observed in deep blue non-doped OLEDs with CIE coordinates less than (0.145, 0.068) to date.
authors.affiliation: WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, South Korea. jjkim@snu.ac.kr.
authors.forename: Kwon-Hyeon
authors.initials: KH
authors.lastname: Kim
authors.forename: Jang Yeol
authors.initials: JY
authors.lastname: Baek
authors.forename: Chan Woo
authors.initials: CW
authors.lastname: Cheon
authors.forename: Chang-Ki
authors.initials: CK
authors.lastname: Moon
authors.forename: Bomi
authors.initials: B
authors.lastname: Sim
authors.forename: Myeong Yong
authors.initials: MY
authors.lastname: Choi
authors.forename: Jang-Joo
authors.initials: JJ
authors.lastname: Kim
authors.forename: Yun-Hi
authors.initials: YH
authors.lastname: Kim