A Surface Engineering Approach for Promoting Dexter Energy Transfer from Lead Halide Perovskite Nanocrystals,The Journal of Physical Chemistry C

当前位置： X-MOL 学术 › J. Phys. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A Surface Engineering Approach for Promoting Dexter Energy Transfer from Lead Halide Perovskite Nanocrystals
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2023-01-06 , DOI: 10.1021/acs.jpcc.2c07664
Chen Wang _{1,

2} , Aaron Malinoski _{1,

2} , Jingheng Yuan _{1,

2} , Courtney Brea _{1,

2} , Guoxiang Hu _{1,

2}

Affiliation

Efficient Dexter energy transfer from colloidal semiconductor nanocrystals lays the foundation for applications like photocatalysis and photon upconversion. We design a two-step functionalization strategy based on aromatic zwitterionic anchoring motifs to fix molecular triplet acceptors to the surface of CsPbBr₃ perovskite nanocrystal (PNC), which increases the energy transfer rate by 120-fold. The binding condition of triplet acceptors and the influence on energy transfer during each surface treatment step are illustrated using steady-state and time-resolved optical spectroscopies and NMR. The results show that this new strategy can preclude competitive adsorption from residual synthetic ligands and achieve stable anchoring for triplet acceptors. Compared to acceptors that undergo rapid exchange on and off the dynamic PNC surface, the fixation significantly strengthens the electronic coupling with the PNC and hence promotes the Dexter energy transfer. Our strategy can be extended for quantitatively grafting other functional groups that require strong electronic coupling with lead halide perovskite surface.

中文翻译：

促进卤化铅钙钛矿纳米晶右旋能量转移的表面工程方法

来自胶体半导体纳米晶体的高效 Dexter 能量转移为光催化和光子上转换等应用奠定了基础。我们设计了一种基于芳香族两性离子锚定基序的两步功能化策略，以将分子三重态受体固定到 CsPbBr _3的表面钙钛矿纳米晶体 (PNC)，可将能量转移率提高 120 倍。三重态受体的结合条件以及每个表面处理步骤中对能量转移的影响使用稳态和时间分辨光谱学和 NMR 进行说明。结果表明，这种新策略可以排除残留合成配体的竞争吸附，实现三线态受体的稳定锚定。与在动态 PNC 表面上下快速交换的受体相比，固定显着加强了与 PNC 的电子耦合，从而促进了 Dexter 能量转移。我们的策略可以扩展到定量接枝其他需要与卤化铅钙钛矿表面进行强电子耦合的官能团。

更新日期：2023-01-06

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南