Molecular Level Understanding of Dynamic Speciation to Inform Complex Reaction Pathways and Control the Rational Synthesis of Ternary Semiconductor Nanoparticles

分子水平上对动态形态的理解，以了解复杂的反应途径并控制三元半导体纳米颗粒的合理合成

• 批准号: 2109141
• 负责人: Amy Prieto
• 金额: $ 49万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2109141&HistoricalAwards=false
• 关键词: Molecular; Level; Understanding; Dynamic; Speciation

With the support of the Macromolecular, Supramolecular, and Nanochemistry Program in the Division of Chemistry, Dr. Amy Prieto of Colorado State University is developing a synthetic toolkit for understanding and controlling the reactivity of selenium species that can direct the synthesis of phase pure ternary semiconductor nanoparticles. These nanomaterials, which are composed of non-toxic, earth-abundant elements, have the potential to offer tunable optoelectronic properties that could be exploited in photovoltaic devices. Dr. Prieto involves high school, undergraduate, and graduate students in this research. The Prieto research team is also developing hands-on learning kits for middle school students that focus on solar cells to engage them in key energy topics. This research involves elucidating how the precursor to monomer transformation of Se powder in high boiling point surfactants can yield phase-pure ternary semiconductor nanoparticles. This includes probing the speciation of reactive components that lead to phase pure copper selenophosphate nanoparticles by focusing on the Lewis acidity and basicity of selenium monomers, understanding these synthetic parameters to controllably access phosphorous deficient metastable C/P/Se nanoparticles, and extrapolating this chemistry to synthesize a new silver compound that contains both phosphorus and selenium. This research is focusing on a diverse range of tools to identify solution species and crystalline products under both in-situ reaction conditions and post-synthesis. By developing this tool kit for the synthesis of semiconductor nanoparticles, reaction pathways for pure phase ternary and quaternary nanoparticles with tunable composition, structure, and surface chemistry are expected and these could be exploited in future photovoltaics.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.

在化学划分中的大分子，超分子和纳米化学计划的支持下，科罗拉多州立大学的艾米·普里托（Amy Prieto）博士正在开发一个合成工具包，以理解和控制硒种的反应性，该工具可以指导相位纯pure ternary emiconductor nananoparticles的合成。这些由无毒的，丰富的元素组成的纳米材料具有提供可调的光电特性的潜力，可以在光伏设备中利用。 Prieto博士参与了高中，本科生和研究生。 Prieto研究团队还正在为中学生开发动手学习工具包，这些学习套件专注于太阳能电池，以使其参与关键的能源主题。这项研究涉及阐明高沸点表面活性剂中SE粉末的前体向单体转化的前体如何产生相位纯三元三元半导体纳米颗粒。这包括探测反应性成分的物种形成，这些组件通过关注硒单体的刘易斯酸度和碱性，了解这些合成参数以可控制的磷酸磷酸座的c/p/se se纳米颗粒，并将这些化学的化学构成新的sell phoss，从而使这些合成的磷酸座的不足C/P/SE纳米颗粒可控制地访问这些合成的磷酸化，从而使这些合成的磷酸化合了新的银色。这项研究集中在各种工具上，以在原位反应条件和合成后识别溶液物种和结晶产物。通过开发用于合成半导体纳米颗粒的该工具套件，可以预期具有可调组成，结构和表面化学的纯相三元和第四纪纳米颗粒的反应途径，并且可以在未来的光伏型中利用这些反应。这些奖项可以通过评估范围来弥补，这些奖项反映了NSF的法律范围，并构成了构成的范围。