title: Controlling Singlet-Triplet Energy Splitting for Deep-Blue Thermally Activated Delayed Fluorescence Emitters.
abstract: The development of efficient metal-free organic emitters with thermally activated delayed fluorescence (TADF) properties for deep-blue emission is still challenging. A new family of deep-blue TADF emitters based on a donor-acceptor architecture has been developed. The electronic interaction between donor and acceptor plays a key role in the TADF mechanism. Deep-blue OLEDs fabricated with these TADF emitters achieved high external quantum efficiencies over 19.2 % with CIE coordinates of (0.148, 0.098).
authors.affiliation: Department of Applied Chemistry, Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
authors.forename: Lin-Song
authors.initials: LS
authors.lastname: Cui
authors.affiliation: Kyulux Inc., Suite 227, Fukuoka Industry-Academia Symphonicity (FiaS), Bldg.2, 4-1 Kyudai-Shinmachi, Nishi-ku, Fukuoka, 819-0388, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Nomura
authors.affiliation: Department of Applied Chemistry, Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
authors.forename: Yan
authors.initials: Y
authors.lastname: Geng
authors.affiliation: Department of Applied Chemistry, Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
authors.forename: Jong Uk
authors.initials: JU
authors.lastname: Kim
authors.affiliation: Department of Applied Chemistry, Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Nakanotani
authors.affiliation: Department of Applied Chemistry, Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.|Japan Science and Technology Agency, ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.|International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
authors.forename: Chihaya
authors.initials: C
authors.lastname: Adachi
keywords: carbazole; fluorescence; organic electronics; organic light-emitting diodes; singlet-triplet splitting