journal article·2021-01-20Open access

Heavy-Atom-Free Room-Temperature Phosphorescent Organic Light-Emitting Diodes Enabled by Excited States Engineering

Heather F. Higginbotham, Masato Okazaki, Piotr de Silva, Satoshi Minakata, Youhei Takeda, Przemyslaw Data

Abstract

Room temperature phosphorescence materials offer great opportunities for applications in optoelectronics, due to their unique photophysical characteristics. However, heavy-atom-free organic emitters that can realize distinct electrophosphorescence are rarely exploited. Herein a new approach for designing heavy-atom-free organic room temperature phosphorescence emitters for organic light-emitting diodes is presented. The subtle tuning of the singlet and triplet excited states energies by appropriate choice of host matrix allows tailored emission properties and switching of emission channels between thermally activated delayed fluorescence and room temperature phosphorescence. Moreover, an efficient and heavy-atom-free room temperature phosphorescence organic light-emitting diode using the developed emitter is realized.
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Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Luminescence and Fluorescent Materials · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Science, Swinburne University of Technology, Hawthorne, Victoria 3122, Australia

Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan

Department of Energy Conversion and Storage, Technical University of Denmark, Anker Engelunds Vej 301, 2800 Kongens Lyngby, Denmark

Faculty of Chemistry, Silesian University of Technology, M. Strzody 9, 44-100 Gliwice, Poland

Physics Department, Durham University, South Road, Durham DH1 3LE, United Kingdom

Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, 41-819 Zabrze, Poland

Funding

European Regional Development Fund · Asahi Glass Foundation · H2020 Marie Sklodowska-Curie Actions · Japan Society for the Promotion of Science · Mitsubishi Foundation · Fundacja na rzecz Nauki Polskiej · Japan Prize Foundation

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