Probing dynamics in perovskite nanocrystals with quantum confinement and doping

通过量子限制和掺杂探测钙钛矿纳米晶体的动力学

• 批准号: 571345-2021
• 负责人: Kambhampati, PatanjaliP
• 金额: $ 1.82万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=747464
• 关键词: Probing; dynamics; perovskite; nanocrystals; quantum

Semiconductor perovskites have rapidly emerged onto the materials science scene since their tremendous initial performance in photovoltaic films in 2014. These perovskites are among the hottest materials in science now for their promise in optoelectronic applications and their new physics. In this proposal we will for the first time follow the full Life Cycle spanning birth of an excitation from initial polaron formation, to exciton formation, to exciton thermalization, to excitonic emission in new perovskite nanocrystals using a suite of three state-of-the-art spectroscopies, made uniquely possible by a one-of-a-kind ultrafast spectroscopy lab. With these three tools of two dimensional electronic spectroscopy (2DE), state-resolved pump/probe (SRPP) spectroscopy, and time-resolved photoluminescence (t-PL) spectroscopy we will monitor all aspects of the dynamical birth, quantum-kinetic evolution, and thermodynamic death of an electronic excitation in a set of novel perovskite system. Following our initial work on bulk perovskite nanocrystals, we will collaborate with Dong Hee Son (Texas A&M) to probe their newest perovskites including quantum dot perovskites and atomically doped perovskites. The impact of this work will be an understanding of structure-function relationships in the newest and most compelling of optoelectronic materials in decades. Our competitive advantage is our world leading ultrafast laser spectroscopy facilities and our prior 15 years expertise in ultrafast exciton dynamics in quantum dots. With the DH Son group we establish a high profile international partnership that will enable discovery grade science and for our group to learn new materials systems. This collaboration will strengthen Canadian international research networks and bring new science to Canadian researchers and provide value added training to HQP.

自2014年在光伏膜中的巨大初步性能以来，半导体钙钛矿已经迅速出现在材料科学现场上。这些钙钛矿是科学中最热门的材料之一，因为他们在光电应用中的承诺和新物理学方面的承诺。在这项提案中，我们将首次遵循从最初的polaron形成到激发，到激发型形成，激发型，再到激子的热量，再到新钙钛矿纳米晶体中的激发型，使用三个最先进的光谱镜组成的套件的激发，从而使单一的脑晶状体发射具有独特的实验性实验室，从而使新的钙钛矿纳米晶体产生激发。 With these three tools of two dimensional electronic spectroscopy (2DE), state-resolved pump/probe (SRPP) spectroscopy, and time-resolved photoluminescence (t-PL) spectroscopy we will monitor all aspects of the dynamical birth, quantum-kinetic evolution, and thermodynamic death of an electronic excitation in a set of novel perovskite system.在我们在散装钙钛矿纳米晶体上的最初工作之后，我们将与Dong Hee Son（Texas A＆M）合作探究其最新的钙钛矿，包括量子dot perovskites和原子掺杂的钙质。这项工作的影响将是对几十年来最新，最引人注目的光电材料中最新，最引人注目的结构功能关系的理解。我们的竞争优势是我们的世界领先的超快激光光谱设施以及我们在量子点中超快激发激子动态方面的15年专业知识。在DH儿子组的情况下，我们建立了一个知名的国际合作伙伴关系，该伙伴关系将使Discovery Grade Science和我们的小组学习新材料系统。这项合作将加强加拿大国际研究网络，并将新科学带给加拿大研究人员，并为HQP提供增值培训。