Solving the Colloidal and Photophysical Instability Problems of Perovskite Quantum Dots via Surface Ligand Engineering

通过表面配体工程解决钙钛矿量子点的胶体和光物理不稳定性问题

• 批准号: 2005079
• 负责人: Hedi Mattoussi
• 金额: $ 51万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2005079&HistoricalAwards=false
• 关键词: Solving; Colloidal; Photophysical; Instability; Problems

With support from the Macromolecular, Supramolecular and Nanochemistry (MSN) Program in the Division of Chemistry and the Solid State and Materials Chemistry (SSMC) Program in the Division of Materials Research, Professors Mattoussi and Ma at Florida State University are developing strategies to enhance the long-term stability of colloidal perovskite nanocrystals. Colloidal perovskite nanocrystals are a class of semiconductor nanocrystals that exhibit several unique physical and spectroscopic properties. These properties can be extremely useful for various technological applications, such as energy harvesting and light-emitting devices (LEDs). However, their limited colloidal and structural stabilities have prevented in depth understanding and inhibited further integration of these materials into electronic devices. The strategies explored by Professors Mattoussi and Ma involve the design of a new set of metal-coordinating polymers that may impart long-term stability to these materials over a wide range of conditions, preserve the nanocrystal integrity, and enhance their optical and electronic properties, thereby bringing the materials closer to use in industrial applications. The research provides an example where chemistry, materials science,and engineering are combined to address important fundamental problems and to advance new technologies. The project also provides a good training for graduate and undergraduate students in aspects ranging from chemical synthesis, engineering, and advanced analytical characterization of light-emitting devices. In addition, Professors Mattoussi and Ma are collaborating with the Florida Center for Research in Science, Technology, Engineering, and Mathematics (FCR-STEM) to create and disseminate K-12 science videos to teachers and students.This NSF-supported project addresses some of the salient problems affecting perovskite nanocrystals, such as poor colloidal and structural stability, using interfacial chemistry approaches. Colloidal perovskite nanocrystals have cores made of either all–inorganic or organic/inorganic hybrid materials and exhibit several unique photophysical properties. They have potential for use in a variety of technological applications. These include use in display technology and photovoltaic cells. One major technical hurdle that has inhibited in-depth characterization and further application of these materials in industry has been their rather very limited stability. To address this issue, the Mattoussi and Ma groups are designing and optimizing a set of coordinating polymers that present either zwitterion or cation/anion anchors. The ligand design offers flexibility in controlling the number, structure and properties of the coordinating motifs as well as the solubilizing blocks, providing polymers that can tightly interact with the nanocrystal surfaces. Such coatings can impart steric stability to these materials over a wide range of conditions, preserve the nanocrystal integrity and potentially enhance their optical and electronic properties. The present project is interdisciplinary in nature, and as such, it provides opportunities for training students in several areas of materials chemistry, spectroscopy, and device engineering.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.

在化学系的大分子、超分子和纳米化学(MSN)计划以及材料研究部的固态和材料化学(SSMC)计划的支持下，佛罗里达州立大学的Mattoussi教授和Ma教授正在开发增强胶体钙钛矿纳米晶长期稳定性的策略。胶体钙钛矿纳米晶是一类具有独特物理和光谱性质的半导体纳米晶。这些特性对于各种技术应用非常有用，例如能量采集和发光设备(LED)。然而，它们有限的胶体和结构稳定性阻碍了人们对这些材料的深入了解，并阻碍了这些材料进一步集成到电子器件中。Mattoussi教授和Ma教授探索的策略包括设计一套新的金属配位聚合物，这种聚合物可以在各种条件下赋予这些材料长期稳定性，保持纳米晶体的完整性，并增强它们的光学和电子性能，从而使材料更接近工业应用。这项研究提供了一个例子，将化学、材料科学和工程学结合起来，以解决重要的基本问题并推进新技术。该项目还为研究生和本科生提供了从化学合成、工程和发光设备的高级分析表征等方面的良好培训。此外，Mattoussi教授和Ma教授正在与佛罗里达科学、技术、工程和数学研究中心(FCR-STEM)合作，制作并向教师和学生传播K-12科学视频。这个由NSF支持的项目利用界面化学方法解决了一些影响钙钛矿纳米晶体的突出问题，如胶体和结构稳定性差。胶体钙钛矿纳米晶具有由全无机或有机/无机杂化材料制成的核心，并显示出一些独特的光物理性质。它们具有在各种技术应用中使用的潜力。这包括在显示技术和光伏电池中的应用。阻碍这些材料深入表征和在工业上进一步应用的一个主要技术障碍是它们的稳定性非常有限。为了解决这个问题，Mattoussi和Ma团队正在设计和优化一组呈现两性离子或阳离子/阴离子锚定的配位聚合物。配体设计提供了灵活的控制配位基序和增溶基团的数量、结构和性质，提供了可以与纳米晶体表面紧密相互作用的聚合物。这种涂层可以在广泛的条件下赋予这些材料空间稳定性，保持纳米晶体的完整性，并潜在地增强它们的光学和电子性能。本项目本质上是跨学科的，因此，它为学生提供了在材料化学、光谱学和设备工程的几个领域进行培训的机会。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Engineering highly fluorescent and colloidally stable CsPbBr3 nanocrystals of different shapes using imidazolium-based polysalt ligands

使用咪唑基聚盐配体设计不同形状的高荧光和胶体稳定的 CsPbBr3 纳米晶体

• DOI: 10.1557/s43580-023-00556-8
• 发表时间: 2023
• 期刊: MRS Advances
• 影响因子: 0.8
• 作者: Vorajee, Unaisah;Donmez, Selin;Wang, Sisi;Mattoussi, Hedi
• 通讯作者: Mattoussi, Hedi

N-Heterocyclic Carbene-Stabilized Gold Nanoparticles: Mono- Versus Multidentate Ligands

• DOI: 10.1021/acs.chemmater.0c03918
• 发表时间: 2021-01
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: N. A. Nosratabad;Zhicheng Jin;Liang Du;Mannat Thakur;H. Mattoussi

N-heterocyclic carbene-based polymer coating of gold nanoparticles and luminescent quantum dots

金纳米颗粒和发光量子点的N-杂环卡宾基聚合物涂层

• DOI: 10.1557/s43580-023-00555-9
• 发表时间: 2023
• 期刊: MRS Advances
• 影响因子: 0.8
• 作者: Arabzadeh Nosratabad, Neda;Jin, Zhicheng;Du, Liang;Mattoussi, Hedi
• 通讯作者: Mattoussi, Hedi

Luminescent Quantum Dots Stabilized by N-Heterocyclic Carbene Polymer Ligands

• DOI: 10.1021/jacs.0c10592
• 发表时间: 2021-01-15
• 期刊: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
• 影响因子: 15
• 作者: Du, Liang;Nosratabad, Neda Arabzadeh;Mattoussi, Hedi
• 通讯作者: Mattoussi, Hedi