Highly Efficient Red Thermally Activated Delayed Fluorescence Emitters by Manipulating Molecular Horizontal Orientation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Changjiang Zhou
  • Dezhi Yang
  • Xiaosong Cao
  • He Liu
  • Dongge Ma
  • Chuluo Yang

Detail(s)

Original languageEnglish
Pages (from-to)3209-3215
Journal / PublicationMaterials Chemistry Frontiers
Volume5
Issue number7
Online published1 Mar 2021
Publication statusPublished - 7 Apr 2021

Abstract

Developing highly efficient red thermally activated delayed fluorescence (TADF) emitter remains a formidable challenge due to strict molecular design principles. In this contribution, two red emitters PXZ-AQPy and PXZ-AQPhPy with high structural rigidity and linear configuration are designed and synthesized based on phenoxazine (PXZ) as donor and acenaphtho[1,2-b]quinoxaline (AQ) as acceptor. Both molecules with horizontal orientation are endowed with TADF and aggregation-induced emission (AIE) properties. By elongating the acceptor segment via phenyl decoration, PXZ-AQPhPy exhibits higher horizontal ratios of emitting dipole orientation (Θ|| = 85%), while the emission characteristics are almost unaltered. Consequently, PXZ-AQPhPy based device achieves a high external quantum efficiency of 19.6 % with emission peak at 610 nm. This work provides a simple and effective design strategy to selectively promote the horizontal orientation of red TADF emitters.

Citation Format(s)

Highly Efficient Red Thermally Activated Delayed Fluorescence Emitters by Manipulating Molecular Horizontal Orientation. / Zhou, Changjiang; Cao, Chen; Yang, Dezhi et al.

In: Materials Chemistry Frontiers, Vol. 5, No. 7, 07.04.2021, p. 3209-3215.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review