Ultraviolet Circularly Polarized Luminescence in Chiral Perovskite Nanoplatelet-Molecular Hybrids : Direct Binding Versus Efficient Triplet Energy Transfer

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

2 Scopus Citations
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Author(s)

  • Bing Tang
  • Qi Wei
  • Nanli Mou
  • Ye Wu
  • Stephen V. Kershaw
  • Xiaoqing Ga
  • Mingjie Li

Detail(s)

Original languageEnglish
Article number2311639
Journal / PublicationSmall
Volume20
Issue number25
Online published10 Jan 2024
Publication statusPublished - 19 Jun 2024

Link(s)

Abstract

The development of ultraviolet circularly polarized light (UVCPL) sources has the potential to benefit plenty of practical applications but remains a challenge due to limitations in available material systems and a limited understanding of the excited state chirality transfer. Herein, by constructing hybrid structures of the chiral perovskite CsPbBr3 nanoplatelets and organic molecules, excited state chirality transfer is achieved, either via direct binding or triplet energy transfer, leading to efficient UVCPL emission. The underlying photophysical mechanisms of these two scenarios are clarified by comprehensive optical studies. Intriguingly, UVCPL realized via the triple energy transfer, followed by the triplet–triplet annihilation upconversion processes, demonstrates a 50-fold enhanced dissymmetry factor glum. Furthermore, stereoselective photopolymerization of diacetylene monomer is demonstrated by using such efficient UVCPL. This study provides both novel insights and a practical approach for realizing UVCPL, which can also be extended to other material systems and spectral regions, such as visible and near-infrared. © 2024 The Authors. Small published by Wiley-VCH GmbH.

Research Area(s)

  • chirality transfer, metal halide perovskite nanoplatelets, nanocrystal-molecular hybrids, triplet energy transfer, UV circularly polarized luminescence

Citation Format(s)

Ultraviolet Circularly Polarized Luminescence in Chiral Perovskite Nanoplatelet-Molecular Hybrids: Direct Binding Versus Efficient Triplet Energy Transfer. / Tang, Bing; Wei, Qi; Wang, Shixun et al.
In: Small, Vol. 20, No. 25, 2311639, 19.06.2024.

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

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