A Novel Photovoltaic Device Using Type II Tunable Core-shell Nanowires

一种使用II型可调谐核壳纳米线的新型光伏器件

• 批准号: 1100489
• 负责人: Leigh Smith
• 金额: $ 35万
• 依托单位: University of Cincinnati Main Campus
• 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: 2011-08-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100489&HistoricalAwards=false
• 关键词: Novel; Photovoltaic; Device; Using; Type

This project is jointly funded by the Energy, Power, and Adaptive Systems (EPAS) Program in the Division of Electrical, Communications and Cyber Systems (ECCS) and the Electronic and Photonic Materials (EPM) Program in the Division of Materials Research (DMR).Research Objectives and Approaches: The objective of this research is to design, fabricate and characterize unique solar cell devices based on strained core-shell semiconductor nanowires. The approach is to design the strained core-shell nanowires so that spatial separation of the electrons and holes occur quantum mechanically on a very short time scale which results in longer charge lifetimes. Photovoltaic devices will be fabricated from these nanowires and electronic structure and performance will be confirmed through optical and transport measurements. Intellectual Merit: Most existing solar-cell technologies use electric fields to separate electrons and holes which can be inefficient and slow. Design of strained core-shell nanowires can enable the rapid separation of electrons and holes through quantum confinement into different layers which should dramatically increase the efficiency for converting light into usable power. Control of the strain allows tuning of the band structure and offsets, which provides a route for optimizing the resulting solar cells.Broader Impacts: This research has strong societal impacts because of the potential for designing high-efficiency solar cells for reducing dependence on fossil fuels. The increased fundamental knowledge of electronic structure and transport in strained core-shell nanowires also significantly impacts nanowire electronics and nanowire-based chemical or biological sensors. The proposed research will train undergraduate and graduate students in advanced theoretical and experimental nanotechnology techniques. In addition, a summer workshop for select high school teachers will guide new educational materials development to allow future students to share in the excitement of and knowledge behind this alternate energy research.

This project is jointly funded by the Energy, Power, and Adaptive Systems (EPAS) Program in the Division of Electrical, Communications and Cyber​​ Systems (ECCS) and the Electronic and Photonic Materials (EPM) Program in the Division of Materials Research (DMR).Research Objectives and Approaches: The objective of this research is to design, fabricate and characterize unique solar cell devices based on strained core-shell semiconductor nanowires. 方法是设计紧张的核心纳米线，以便在非常短的时间范围内机械地进行电子和孔的空间分离，从而导致较长的充电寿命。 光伏设备将从这些纳米线制造，电子结构将通过光学和传输测量确认。 智力优点：大多数现有的太阳能电池技术都使用电场将电子和孔分开，这些电子和孔效率低下且缓慢。 应变的核心壳纳米线的设计可以通过量子限制到不同的层将电子和孔快速分开，这应该显着提高将光转化为可用功率的效率。 对应变的控制允许调整带的结构和偏移，这为优化所得太阳能电池提供了一条途径。Boader的影响：这项研究具有强大的社会影响，因为有可能设计高效太阳能电池以减少对化石燃料的依赖。 应变核心纳米线中电子结构和运输的基本知识增加也显着影响纳米线电子和基于纳米线的化学或生物传感器。 拟议的研究将培训高级理论和实验纳米技术技术的本科生和研究生。 此外，精选高中教师的夏季研讨会将指导新的教育材料开发，以使未来的学生能够分享这项替代能源研究背后的兴奋和知识。