Controlling Singlet-Triplet Energy Splitting for Deep-Blue Thermally Activated Delayed Fluorescence Emitters

Lin-Song Cui; Hiroko Nomura; Yan Geng; Jong Uk Kim; Hajime Nakanotani; Chihaya Adachi

doi:10.1002/anie.201609459

Controlling Singlet-Triplet Energy Splitting for Deep-Blue Thermally Activated Delayed Fluorescence Emitters

Angew Chem Int Ed Engl. 2017 Feb 1;56(6):1571-1575. doi: 10.1002/anie.201609459. Epub 2016 Dec 30.

Authors

Lin-Song Cui¹, Hiroko Nomura², Yan Geng¹, Jong Uk Kim¹, Hajime Nakanotani¹, Chihaya Adachi^{1

3

4}

Affiliations

¹ Department of Applied Chemistry, Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
² Kyulux Inc., Suite 227, Fukuoka Industry-Academia Symphonicity (FiaS), Bldg.2, 4-1 Kyudai-Shinmachi, Nishi-ku, Fukuoka, 819-0388, Japan.
³ Japan Science and Technology Agency, ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
⁴ International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.

PMID: 28035781
DOI: 10.1002/anie.201609459

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).

Keywords: carbazole; fluorescence; organic electronics; organic light-emitting diodes; singlet-triplet splitting.

Publication types

Research Support, Non-U.S. Gov't