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

目的：本项目旨在探索胶体化合物量子点（QDs）在固态照明用高效白光二极管（led）中的应用。磷基白光led中传统的多步骤吸收-再发射颜色转换方案将被胶体CdSe/(Cd,Zn)S qd -荧光粉与电泵浦InGaN量子阱/点之间的非谐振腔增强直接能量耦合所取代。本工作的目标是设计和制造具有显著提高辐射效率、高亮度和高显色指数以及低制造成本的新一代白光光源。智力优势：本项目提供了一种协同的方法来推进外延生长量子结构与化学合成胶体纳米晶体量子点之间的非辐射能量转移的科学和技术。此外，它还提供了一个平台，使新兴的量子点技术，包括量子点组装微腔，工程核壳量子点和多色量子点的雾状图案，将首次集成在一起，以实现功能光子系统。更广泛的影响：该项目的成果将应用于下一代白光光源，这将大大节省能源。工业研究人员的参与将有助于将该项目的成果纳入商业产品。该项目将为研究生和本科生参与者提供重点研究和学习经验，并且研究结果将整合到课堂教学中，为学生提供将纳米技术的基础科学与现实世界的应用联系起来的机会。还将为高中露营者创造新的活动。

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.