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| CsPbBr3纳米片–萘之间的高效三线态能量传递 |
| High-efficiency triplet energy transfer between CsPbBr3 nanoplatelets and naphthalene |
| 投稿时间：2021-03-25 |
| DOI：10.3969/j.issn.1005-5630.2021.06.006 |
| 中文关键词: CsPbBr3 纳米片 三线态能量传递 |
| 英文关键词:CsPbBr3 nanoplatelets triplet energy transfer |
| 基金项目:国家重点研发计划(2017YFF0106304、2016YFF0200306) |
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| 中文摘要: |
| 铯铅卤化物钙钛矿纳米晶是光伏和发光应用领域中理想化的三线态敏化材料，具有较高的荧光量子产率和量子限域效应。以三层厚度的CsPbBr3纳米片（NPLs）为三线态给体，实现了从NPLs到1-萘甲酸（NCA）分子的高效三线态能量传递（TET）。CsPbBr3 NPLs采用配体辅助再沉淀方法制备，其与NCA分子结合后，稳态荧光被大幅淬灭，荧光寿命从复合前的6.743 ns缩短到0.995 ns，TET效率达到85.3%。通过与大尺寸纳米立方体对比发现，对于CsPbBr3-多环芳烃复合体系，量子限域效应是获得高效TET的关键。研究结果表明，CsPbBr3 NPLs作为三线态敏化剂，可应用在基于TET的光子上转换、光催化氧化-还原反应和室温磷光等领域。 |
| 英文摘要: |
| 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. |
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