GaNP Based Coaxial Nanowires for Photovoltaic Applications

用于光伏应用的 GaN 基同轴纳米线

• 批准号: 1106369
• 负责人: Charles Tu
• 金额: $ 38万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1106369&HistoricalAwards=false
• 关键词: GaNP; Based; Coaxial; Nanowires; Photovoltaic

Technical: This research project investigates growth and properties of dilute nitride GaNP core/shell nanowires and studies their potential for efficient solar cell applications. The dilute nitride GaNxP1-x is unique among the common semiconductors in that it has a large bandgap bowing and its bandgap can cover a wide range of solar spectrum for relatively small concentrations of nitrogen. Photons are absorbed in both the core and the shell of the GaNxP1-x/GaNyP1-y core/shell nanowires, and photogenerated electrons and holes are separated by the type-II staggered band alignment of the core and the shell, relaxing the requirement of long minority carrier lifetime in a planar solar-cell device. The GaNP-based coaxial nanowires can potentially be a viable alternate to the current triple-junction technology because of its less stringent requirement on material quality (due to spontaneous electron hole separation), simpler processing (due to only one junction), and lower materials cost.Nontechnical: The project addresses basic research issues in a topical area of materials science with high technological relevance. The research, if successful, can have significant impacts on solar-cell development using nanoscience and nanotechnology. The research activities promote interdisciplinary training for graduate and undergraduate students in growth and characterization of novel compound semiconductors and in solar cell design, fabrication and testing, as well as written and oral presentations. The PI is the Director of the California State Summer School for Mathematics and Science (COSMOS) residential summer program for more than 100 high school students. The results of this research can be incorporated into the curriculum and extend to the high schools through the Teacher Fellow program of COSMOS.

技术：该研究项目研究了稀氮化物GANP核/壳纳米线的生长和特性，并研究了其有效太阳能电池应用的潜力。在常见的半导体中，稀氮化物GANXP1-X是独一无二的，因为它具有较大的带镜弓，其带隙可以覆盖广泛的太阳能光谱，从而获得相对较小的氮气。光子在GANXP1-X/GANYP1-Y核/壳纳米线的核心和外壳中都被吸收，并且通过核心和外壳的II类交错带比对，光构的电子和孔被放松，从而放松了平面太阳能型套件中少数少数式载体的需求。基于GANP的同轴纳米线可能是当前三连接技术的可行替代品，因为其对材料质量的需求较小（由于自发电子孔分离），更简单的处理（仅是一个连接）（由于一个连接）以及较低的材料成本。这项研究，如果成功的话，可以使用纳米科学和纳米技术对太阳能电池开发产生重大影响。研究活动促进了新型复合半导体以及太阳能细胞设计，制造和测试以及书面和口头表现的新型复合半导体的成长和表征的研究生和本科生的跨学科培训。 PI是加利福尼亚州立大学数学与科学暑期学校（Cosmos）的夏季夏季夏季夏季计划的主任。这项研究的结果可以纳入课程中，并通过Cosmos的教师研究员计划扩展到高中。