GOALI: Enhanced Nonradiative Energy Coupling between Quantum Dot Phosphors and InGaN Emitters - Towards High-Efficiency White LEDs

目标：增强量子点荧光粉和 InGaN 发射器之间的非辐射能量耦合 - 迈向高效白光 LED

• 批准号: 0824186
• 负责人: Jian Xu
• 金额: $ 33万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0824186&HistoricalAwards=false
• 关键词: GOALI; Enhanced; Nonradiative; Energy; Coupling

Objective: This project aims to explore the application of colloidal compound quantum dots (QDs) for the development of high-efficiency white light emitting diodes (LEDs) for solid state lighting. The conventional, multistep, absorption-¬reemission color-conversion scheme in phosphor-based white LEDs will be replaced by non-resonant cavity-enhanced direct energy coupling between colloidal CdSe/(Cd,Zn)S QD-phosphors and electrically-pumped InGaN quantum wells/dots. The goal of this work will be to design and fabricate a new generation of white light sources featuring significantly improved radiation efficiency, high brightness and high color rendering index as well as low manufacturing costs. Intellectual Merit: This project offers a synergistic approach to advance the science and technology of nonradiative energy transfer between epitaxially-grown quantum structures with chemically-synthesized colloidal nanocrystal quantum dots. In addition, it provides a platform whereupon emerging QD technologies, including QD-assembled microcavities, engineered core-shell QDs, and mist-patterning of multicolor QDs, will be integrated for the first time for the implementation of a functional photonic system. Broader Impacts: The results from this project will find application in next-generation white light sources that will provide great energy savings. Participation by industrial investigators will facilitate the integration of results from this project into commercial products. The project will offer focused research and learning experiences to the graduate and undergraduate student participants, and findings will be integrated into classroom instruction, providing opportunities for students to connect fundamental nanoscience to real-world applications of nanotechnology. New activities will also be created for high school campers.

目的：该项目旨在探索胶体复合量子点（QD）在固态照明中开发高效白光发光二极管（LED）的应用，传统的多步吸收-再发射颜色转换方案。基于磷光体的白光 LED 将被胶体 CdSe/(Cd,Zn)S QD 磷光体之间的非谐振腔增强直接能量耦合所取代这项工作的目标是设计和制造具有显着提高的辐射效率、高亮度和高显色指数以及低制造成本的新一代白光源。该项目提供了一种协同方法，以推进外延生长的量子结构与化学合成的胶体纳米晶体量子点之间的非辐射能量转移科学和技术。此外，它还提供了一个平台，首次集成新兴量子点技术，包括量子点组装微腔、工程核壳量子点和多色量子点雾状图案，以实现更广泛的功能性光子系统：该项目的成果将应用于下一代白光源，从而节省大量能源。工业研究人员的参与将有助于将该项目的成果整合到商业产品中。为研究生和本科生参与者提供研究和学习经验，并将研究结果纳入课堂教学，为学生提供将基础纳米科学与纳米技术的实际应用联系起来的机会。