LEAPS-MPS: Achieving Single Lead Halide Perovskite Nanocrystal Growth on a Soft Liquid/Liquid Interface

LEAPS-MPS：在软液/液界面上实现单卤化铅钙钛矿纳米晶体生长

• 批准号: 2316919
• 负责人: Yitong Dong
• 金额: $ 24.96万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2316919&HistoricalAwards=false
• 关键词: LEAPS; MPS; Achieving; Single; Lead

In this project, managed by the Chemistry Division and jointly funded by the Established Program to Stimulate Competitive Research (EPSCoR), Professor Yitong Dong and his students at the University of Oklahoma (OU) will study lead halide perovskite nanocrystal growth at the single-particle level to advance the development of low-cost single photon emitters (SPEs). SPEs that emit photons on demand are necessary to build future quantum photonic networks that ensure secure quantum communications. This project will enable accurate spectroscopy measurements of individual perovskite nanocrystals without interferences from post-synthesis nanocrystal degradations. Furthermore, the findings will advance the understanding of the growth mechanism of colloidal perovskite nanocrystals. The project will integrate new material synthesis approaches into different research programs and centers at OU. Professor Dong will also create opportunities to engage undergraduate students through the project and encourage the participation of prospective students through a series of outreach programs. Professor Dong and his students will create a nano-sized liquid/liquid (L/L) interface confined to the tip of a nanopipette for nanocrystal growth. The diffusion and delivery of crystal precursors will be regulated by tuning their electrochemical potentials. The nanocrystal nucleation and growth kinetics are expected to be tunable by controlling the dimensions of the nanopipette tip and the electrochemical biases applied across the L/L interface. They will also use a confocal fluorescence microscope to monitor the photoluminescence spectra of nanocrystals during their growth and photon correlation measurements to assess the number of nanocrystals generated on the L/L interface. These efforts will achieve single lead halide perovskite nanocrystal growth.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在这个由化学部管理并由刺激竞争研究的既定计划（EPSCoR）共同资助的项目中，俄克拉荷马州大学的Yitong Dong教授和他的学生将在单粒子水平上研究铅卤化物钙钛矿晶体生长，以促进低成本单光子发射器（SPE）的发展。按需发射光子的SPE对于构建未来的量子光子网络以确保安全的量子通信是必要的。该项目将能够准确测量单个钙钛矿纳米晶体的光谱，而不会受到合成后降解的干扰。此外，研究结果将促进对胶体钙钛矿纳米晶体生长机制的理解。该项目将把新的材料合成方法整合到不同的研究项目和中心。董教授还将创造机会通过该项目吸引本科生，并鼓励未来的学生通过一系列外展计划参与。董教授和他的学生将创建一个纳米尺寸的液体/液体（L/L）界面，该界面被限制在纳米移液管的尖端，用于快速生长。晶体前体的扩散和传递将通过调节它们的电化学电势来调节。通过控制纳米移液管尖端的尺寸和在L/L界面上施加的电化学偏压，预期纳米成核和生长动力学是可调的。他们还将使用共聚焦荧光显微镜来监测纳米晶体生长过程中的光致发光光谱，并进行光子相关测量，以评估L/L界面上生成的纳米晶体的数量。这些努力将实现单一卤化铅钙钛矿晶体生长。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。