Investigating the effects of thermal-opto-mechanical interactions on optical responses of multilayer semiconductor nanocrystals

研究热光机械相互作用对多层半导体纳米晶体光学响应的​​影响

• 批准号: 2018411
• 负责人: Fuqian Yang
• 金额: $ 44.26万
• 依托单位: University of Kentucky Research Foundation
• 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: 2020-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2018411&HistoricalAwards=false
• 关键词: Investigating; effects; thermal; opto; mechanical

This project will investigate the optical characteristics of multilayer semiconductor nanocrystals under different thermal environments and mechanical stresses. Semiconductor nanocrystals are nanoscale crystalline particles with physical and optical properties that are tunable through controlling their size and geometric shape. This project will study the characteristics of multilayer semiconductor nanocrystals made from cadmium selenide, cadmium sulphide and zinc sulphide, which are synthesized in a microreactor system. A comprehensive understanding of the thermal-opto-mechanical properties in these multilayer semiconductor nanocrystals can lead to the development of nanocrystal-based devices and systems, as well as better design approaches for their applications in optomechanical devices and systems, nanophotonics, and biosensors, such as white light-emitting diodes. The results from this research will help strengthen U.S. standing and influence in nanoelectronics, solar energy and nanophotonics. The interdisciplinary nature of this research will help the American workforce become more competitive in both materials processing and photonics through the training of graduate and undergraduate students. These students will master the synthesis and characterization skills of semiconductor nanocrystals and will develop the skills for solving technical problems. The investigator will actively recruit women and underrepresented minorities in order to promote their inclusion in the fields of nanophotonics and biophotonics.Semiconductor nanocrystals as potential building blocks of nanophotonics and biophotonics have attracted great interest in a variety of applications. The comprehensive understanding of the effects of the geometric dimensions and thermal-opto-mechanical interactions on the optical characteristics of the multilayer semiconductor nanocrystals can help develop better performing and more reliable nanocrystal-devices and systems. This research project will investigate the optical characteristics of the multilayer semiconductor nanocrystals under thermomechanical loading, including tension, compression and cyclic heating-cooling via a closely coupled experimental and modeling approach, and the dependence of the geometrical dimensions of the multilayer semiconductor nanocrystals on the precursor concentrations, temperature and residence time. A microreactor in a microfluidic system will be developed to synthesize the multilayer semiconductor nanocrystals and to investigate the rate mechanisms controlling the growth of the multilayer semiconductor nanocrystals in a flow environment. The research team will establish correlations between optical properties of the multilayer semiconductor nanocrystals, stress, and temperature as well as the geometrical dimensions. The team will develop numerical models that can quantitatively analyze optical responses of nanocrystals under thermomechanical loading. These relationships provide fundamental understanding of the thermal-opto-mechanical coupling in semiconductor nanocrystals and can provide guidelines to better design nanocrystal-based devices and systems with high performance and reliability. Students will be trained on the design of microfluidic reactors and the development of the techniques for local characterization of thermal-opto-mechanical behavior of semiconductor nanocrystals. A design project of developing microfluidic systems for chemical reactions will be developed and offered to high school and undergraduate students, from which students can learn both the technical and nontechnical requirements for the design of a useful product.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.

本项目将研究多层半导体纳米晶体在不同热环境和机械应力下的光学特性。半导体纳米晶体是具有物理和光学特性的纳米级晶体粒子，可通过控制其大小和几何形状来调节。本项目将研究以硒化镉、硫化镉和硫化锌为原料，在微反应器系统中合成多层半导体纳米晶体的特性。全面了解这些多层半导体纳米晶体的热-光-机械特性可以促进基于纳米晶体的器件和系统的发展，以及更好的设计方法，使其应用于光机械器件和系统、纳米光子学和生物传感器，如白光发光二极管。这项研究的结果将有助于加强美国在纳米电子学、太阳能和纳米光子学方面的地位和影响力。这项研究的跨学科性质将通过对研究生和本科生的培训，帮助美国劳动力在材料加工和光子学方面变得更具竞争力。这些学生将掌握半导体纳米晶体的合成和表征技能，并将发展解决技术问题的技能。研究者将积极招募妇女和代表性不足的少数民族，以促进他们在纳米光子学和生物光子学领域的纳入。半导体纳米晶体作为纳米光子学和生物光子学的潜在组成部分，在各种应用中引起了人们的极大兴趣。全面理解几何尺寸和热-光-力相互作用对多层半导体纳米晶体光学特性的影响，有助于开发性能更好、更可靠的纳米晶体器件和系统。本项目将通过紧密耦合的实验和建模方法，研究多层半导体纳米晶体在拉伸、压缩和循环加热-冷却等热机械载荷下的光学特性，以及多层半导体纳米晶体的几何尺寸对前驱体浓度、温度和停留时间的依赖关系。在微流控系统中研制了一种微反应器，用于合成多层半导体纳米晶体，并研究了多层半导体纳米晶体在流动环境中生长的速率机制。研究小组将建立多层半导体纳米晶体的光学性质、应力、温度和几何尺寸之间的关系。该团队将开发数值模型，可以定量分析纳米晶体在热机械载荷下的光学响应。这些关系提供了对半导体纳米晶体中热-光-机械耦合的基本理解，并可以为更好地设计高性能和可靠性的纳米晶体器件和系统提供指导。学生将学习微流控反应器的设计和半导体纳米晶体热-光-机械行为局部表征技术的发展。开发用于化学反应的微流体系统的设计项目，并提供给高中生和本科生，学生可以从中学习设计有用产品的技术和非技术要求。该奖项反映了美国国家科学基金会的法定使命，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。

项目成果

Green-route manufacturing towards future industrialization of metal halide perovskite nanocrystals

金属卤化物钙钛矿纳米晶未来工业化的绿色制造路线

• DOI: 10.1039/d3cc05282f
• 发表时间: 2024
• 期刊: Chemical Communications
• 影响因子: 4.9
• 作者: Tang, Xiaobing;Quan, Wenzhuo;Yang, Fuqian
• 通讯作者: Yang, Fuqian

Water-driven CsPbBr3 nanocrystals and poly(methyl methacrylate)-CsPbBr3 nanocrystal films with bending-endurable photoluminescence

• DOI: 10.1016/j.cej.2021.131456
• 发表时间: 2021-12
• 期刊: Chemical Engineering Journal
• 影响因子: 15.1
• 作者: Xiaobing Tang;N. Kothalawala;Yulin Zhang;D. Qian;D. Kim;Fuqian Yang

Ultra-stable blue-emitting lead-free double perovskite Cs 2 SnCl 6 nanocrystals enabled by an aqueous synthesis on a microfluidic platform

在微流体平台上通过水相合成实现超稳定的蓝光无铅双钙钛矿 Cs 2 SnCl 6 纳米晶体

• DOI: 10.1039/d2nr05510d
• 发表时间: 2022
• 期刊: Nanoscale
• 影响因子: 6.7
• 作者: Tang, Xiaobing;Wen, Xiyu;Yang, Fuqian
• 通讯作者: Yang, Fuqian

Modeling analysis of the growth of a cubic crystal in a finite space

有限空间中立方晶体生长的建模分析

• DOI: 10.1039/d2cp00260d
• 发表时间: 2022
• 期刊: Physical Chemistry Chemical Physics
• 影响因子: 3.3
• 作者: Yang, Fuqian

Solventless mechanochemical synthesis of Sn-based halide perovskite microcrystals with high stability tracked by photoluminescence spectroscopy

• DOI: 10.1016/j.jlumin.2023.120432
• 发表时间: 2023-12
• 期刊: Journal of Luminescence
• 影响因子: 3.6
• 作者: Xuan Huang;Xiaobing Tang;Xiyu Wen;Y. C. Lu;Fuqian Yang