• Optical Instruments
  • Vol. 43, Issue 6, 32 (2021)
Yuhong ZHANG, Debao ZHANG, and Guanjun YOU*
Author Affiliations
  • School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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    DOI: 10.3969/j.issn.1005-5630.2021.06.006 Cite this Article
    Yuhong ZHANG, Debao ZHANG, Guanjun YOU. High-efficiency triplet energy transfer between CsPbBr3 nanoplatelets and naphthalene[J]. Optical Instruments, 2021, 43(6): 32 Copy Citation Text show less

    Abstract

    Lead cesium perovskite nanocrystals have become ideal triplet sensitizers in photovoltaic and luminescent applications due to their high fluorescence quantum yield and quantum confinement effect. In this paper, three-monolayer CsPbBr3 nanoplatelets (NPLs) were used as triplet donors to achieve efficient triplet energy transfer (TET) from NPLs to 1-naphthalene carboxylic acid (NCA). CsPbBr3 NPLs were synthesized by ligand-assisted reprecipitation at room temperature. After binding with NCA, the steady-state fluorescence of NPLs was quenched substantially, the fluorescence lifetime was shortened from 6.743 ns to 0.995 ns, and the TET efficiency was as high as 85.3%. Compared with the large nanocubes, the quantum confinement is the key to obtain high-efficiency TET for CsPbBr3-polycyclic aromatic hydrocarbons (CsPbBr3-PAHs) complex system. The results indicate that CsPbBr3 NPLs can be used as triplet sensitizers in the fields of photon upconversion, photocatalytic oxidation-reduction reaction and room temperature phosphorescence based on TET.
    Yuhong ZHANG, Debao ZHANG, Guanjun YOU. High-efficiency triplet energy transfer between CsPbBr3 nanoplatelets and naphthalene[J]. Optical Instruments, 2021, 43(6): 32
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