Nanostructure Visible Light Emitting Diodes

“这项奖励是根据2009年美国复苏和再投资法案（公法111-5）资助的。”这项研究的目标是推进可见光led的科学和技术，这种技术是由柱状纳米结构制造的，可以发射可见光波长和高效率。提出了一个探索纳米结构可见发光二极管（led）的研究方案。这项研究的目标是推进可见光led的科学和技术，这种技术是由柱状纳米结构制造的，可以发射可见光波长和高效率。InGaN材料系统中的单波长和多波长发射纳米线led将被研究最终在低成本衬底上制造。将进行物理结构的建模，包括由纳米级柱状几何结构实现的新异质结设计。与平面设计相比，在这种结构中减少应变和使用非极性和半极性面将提高效率。我们的目标是了解纳米线中的载流子传输和重组，并缓解限制纳米线效率的过程。纳米图案将通过控制物理尺寸和材料成分来控制发射波长。本方案的广泛影响本方案将尽可能由代表性不足的少数民族执行。来自南加州大学优秀研究项目的研究生和两名本科生助理将学习设备研究固有的跨学科性质。由PI担任主任的能源纳米科学与技术中心将被用来激发年轻学生（K - 12）和教师对led和节能的兴趣。研究结果将被纳入南加州大学的两门光子学课程。

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."The objective of the research will be to advance the science and technology of visible LEDs fabricated from columnar nanostructures that emit at visible wavelengths and with high efficiencies.Intellectual Merit of the ProgramA program of research is proposed to explore nanostructure visible light emitting diodes (LEDs). The objective of the research will be to advance the science and technology of visible LEDs fabricated from columnar nanostructures that emit at visible wavelengths and with high efficiencies. Single and multiple wavelength emission nanowire LEDs in the InGaN materials system will be investigated for eventual fabrication on low cost substrates. Modeling of the physical structures involving new heterojunction designs enabled by the nanoscale columnar geometry will be undertaken. Reduced strain and use of non-polar and semi-polar facets in such structures will improve efficiency compared to planar designs. Understanding carrier transport and recombination in the nanowires and mitigation of processes that limit the efficiency of nanowires are the goals. Nanopatterning will be used to control the emission wavelength through control of physical dimensions and material compositions. Broader Impact of the ProgramTo the extent possible, the program will be carried out by under-represented minorities. Graduate students and two undergraduate assistants from the USC Merit research program will learn the inherent interdisciplinary nature of device research. The Center for Energy Nanoscience and Technology for which the PI is Director will be exploited to induce interest in LEDs and in energy conservation among young students (K - 12) and teachers. The results will be included in two courses on photonics at USC.