Two boron atoms versus one: high-performance deep-blue multi-resonance thermally activated delayed fluorescence emitters

Chin-Yiu Chan; Subeesh Madayanad Suresh; Yi-Ting Lee; Youichi Tsuchiya; Tomas Matulaitis; David Hall; Alexandra M Z Slawin; Stuart Warriner; David Beljonne; Yoann Olivier; Chihaya Adachi; Eli Zysman-Colman

doi:10.1039/d2cc03347j

Two boron atoms versus one: high-performance deep-blue multi-resonance thermally activated delayed fluorescence emitters

Chem Commun (Camb). 2022 Aug 18;58(67):9377-9380. doi: 10.1039/d2cc03347j.

Authors

Affiliations

¹ Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka 819-0395, Japan. chinyiu.chan@opera.kyushu-u.ac.jp.
² Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK. eli.zysman-colman@st-andrews.ac.uk.
³ Laboratory for Chemistry of Novel Materials, University of Mons, 7000, Mons, Belgium.
⁴ School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, UK.
⁵ Laboratory for Computational Modeling of Functional Materials, Namur Institute of Structured Matter, Université de Namur, Rue de Bruxelles, 61, B-5000 Namur, Belgium.
⁶ International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan. adachi@cstf.kyushu-u.ac.jp.

PMID: 35920112
DOI: 10.1039/d2cc03347j

Abstract

Two new deep-blue narrowband multi-resonant emitters, 1B-DTACrs and 2B-DTACrs, one of which shows thermally activated delayed fluorescence (TADF), based on boron, nitrogen, and oxygen doped nanographenes are reported. Devices based on 2B-DTACrs showed an EQE_max of 14.8% and CIE coordinates of (0.150, 0.044), which are very close to the BT.2020 requirement for blue pixels.