Ultraviolet Circularly Polarized Luminescence in Chiral Perovskite Nanoplatelet-Molecular Hybrids : Direct Binding Versus Efficient Triplet Energy Transfer
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 2311639 |
Journal / Publication | Small |
Volume | 20 |
Issue number | 25 |
Online published | 10 Jan 2024 |
Publication status | Published - 19 Jun 2024 |
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DOI | DOI |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85181962070&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(573cbe25-beb7-4cae-b35b-39b13e252b48).html |
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.
In: Small, Vol. 20, No. 25, 2311639, 19.06.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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