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

目的：本计画旨在探讨胶体化合物量子点应用于固态照明用高效率白色发光二极体之开发。基于磷光体的白色LED中的传统的多步吸收-再发射颜色转换方案将被胶体CdSe/（Cd，Zn）S QD磷光体和电泵浦InGaN量子威尔斯/点之间的非共振腔增强直接能量耦合所取代。本课题的目标是设计和制造新一代的白色光源，其特点是辐射效率显著提高，亮度高，显色指数高，制造成本低。智力优势：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量子点之间的非辐射能量转移的科学和技术。此外，它提供了一个平台，其中新兴的量子点技术，包括量子点组装的微腔，工程核壳量子点，和雾图案化的量子点，将首次集成的功能光子系统的实施。 更广泛的影响：该项目的成果将应用于下一代白色光源，从而节省大量能源。工业调查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，研究结果将被整合到课堂教学中，为学生提供机会，将基础纳米科学与纳米技术的实际应用联系起来。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.