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(QD)在开发用于固态照明的高效白光发光二极管(LED)方面的应用。胶体CdSe/(Cd，Zn)S QD荧光粉与电泵浦的InGaN量子井/点之间的非共振腔增强直接能量耦合将取代传统的多步吸收-再发射的颜色转换方案。这项工作的目标是设计和制造新一代白光光源，具有显著提高的辐射效率、高亮度和高显色指数以及低制造成本。智力价值：该项目提供了一种协同方法，以促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的科学和技术。此外，它还提供了一个平台，在这个平台上，将首次集成新兴的量子点技术，包括量子点组装的微腔、工程的核壳量子点和多色量子点的雾化图案化，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，将提供巨大的能源节约。工业调查人员的参与将有助于将该项目的结果整合到商业产品中。该项目将为研究生和本科生参与者提供有针对性的研究和学习体验，并将研究成果整合到课堂教学中，为学生提供将基础纳米科学与纳米技术的现实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.