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†‡

Chin-Yiu Chan,§*^a Subeesh Madayanad Suresh,§^b Yi-Ting Lee,§^a Youichi Tsuchiya,

^a Tomas Matulaitis,^b David Hall,^bc Alexandra M. Z. Slawin,

^b Stuart Warriner,^d David Beljonne,

^c Yoann Olivier,

^e Chihaya Adachi

*^af and Eli Zysman-Colman

*^b

Author affiliations

* Corresponding authors

^a Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka 819-0395, Japan
E-mail: chinyiu.chan@opera.kyushu-u.ac.jp

^b Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK
E-mail: eli.zysman-colman@st-andrews.ac.uk

^c Laboratory for Chemistry of Novel Materials, University of Mons, Mons, Belgium

^d School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, UK

^e Laboratory for Computational Modeling of Functional Materials, Namur Institute of Structured Matter, Université de Namur, Rue de Bruxelles, 61, B-5000 Namur, Belgium

^f International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
E-mail: adachi@cstf.kyushu-u.ac.jp

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.

This article is part of the themed collection: Chemosensors and Molecular Logic

Chemical Communications

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

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

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