Intramolecular Cyclization : A Convenient Strategy to Realize Efficient BT.2020 Blue Multi-Resonance Emitter for Organic Light-Emitting Diodes

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article numbere202215226
Journal / PublicationAngewandte Chemie - International Edition
Volume62
Issue number10
Online published2 Jan 2023
Publication statusPublished - 1 Mar 2023

Link(s)

Abstract

Rationally tuning the emission position and narrowing the full width at half-maximum (FWHM) of an emitter is of great importance for many applications. By synergistically improving rigidity, strengthening the resonant strength, inhibiting molecular bending and rocking, and destabilizing the HOMO energy level, a deep-blue emitter (CZ2CO) with a peak wavelength of 440 nm and an ultranarrow spectral FWHM of 16 nm (0.10 eV) was developed via intramolecular cyclization in a carbonyl/N resonant core (QAO). The dominant υ0-0 transition character of CZ2CO gives a Commission Internationale de I’Éclairage coordinates (CIE) of (0.144, 0.042), nicely complying with the BT.2020 standard. Moreover, a hyper-fluorescent device based on CZ2CO shows a high maximum external quantum efficiency (EQEmax) of 25.6 % and maintains an EQE of 22.4 % at a practical brightness of 1000 cd m−2. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • Aromatic Diketone, Blue Thermally Activated Delayed Fluorescence, Intramolecular Cyclization, Multi-Resonance Emitter, Organic Light-Emitting Diodes

Citation Format(s)

Intramolecular Cyclization: A Convenient Strategy to Realize Efficient BT.2020 Blue Multi-Resonance Emitter for Organic Light-Emitting Diodes. / Cao, Chen; Tan, Ji-Hua; Zhu, Ze-Lin et al.
In: Angewandte Chemie - International Edition, Vol. 62, No. 10, e202215226, 01.03.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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