title: Blue fluorescent OLED materials and their application for high-performance devices.
abstract: The authors applied two technologies to improve the efficiency of fluorescent blue organic light-emitting diodes (OLEDs). First, an efficiency-enhancement layer (EEL) was introduced to boost triplet-triplet fusion (TTF). Second, new blue dopants with a higher orientation factor in the emitting layer were developed. Consequently, the external quantum efficiency (EQE) was increased up to 11.5% with Commission Internationale de l'Eclairage (CIE) 1931 color coordinates of (0.138, 0.092). The reported results may lead to EQEs that exceed 14% with fluorescent blue emitters.
authors.affiliation: Electronic Materials Department, Idemitsu Kosan Co., Ltd, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Kuma
authors.affiliation: Electronic Materials Department, Idemitsu Kosan Co., Ltd, Japan.
authors.forename: Chishio
authors.initials: C
authors.lastname: Hosokawa
keywords: blue fluorescent; electroluminescent; organic light-emitting diodes; orientation; triplet