Heterojunction Solar Cells Using Chemically co-doped Titania Nanotube Arrays for Simultaneous Light Absorption and Carrier Transport

技术：本项目以纳米线的带隙工程、纳米线异质结处的带对及其对载流子注入和输运的影响为基础。该研究旨在通过共掺杂来设计TiO2带隙，并在太阳能电池中设计具有p型半导体异质结的TiO2表面，以增加吸收，通过控制带对准来分离电荷分离，并最大限度地减少表面复合。研究活动是在物理，化学和工程的交叉，涉及密度泛函理论，材料合成，器件制造，结构和物理性质表征和建模。一个重要的项目目标是开发一种基于化学共掺杂二氧化钛纳米管的异质结太阳能电池，该纳米管表面涂有溶液处理的p型半导体。非技术：该项目涉及材料科学主题领域的基础研究问题，具有高技术相关性。能源可持续性被认为是这个太阳能电池研究项目对社会的主要潜在好处。开发的材料系统和设备，以及获得的基本知识，可以扩展到其他领域，如固态照明，化学传感和柔性电子。该项目为研究生和本科生提供跨学科培训。

Technical: This project centers on the fundamental understanding of the band gap engineering of nanowires, the band alignment at the nanowire heterojunction, and their effects on carrier injection and transport. The research aims to engineer both the TiO2 band gap by co-doping and the TiO2 surface with a p-type semiconductor heterojunction for solar cells in order to increase absorption, to separate charge separation via control of band alignment, and to minimize surface recombination. The research activities are at the intersection of physics, chemistry, and engineering, involving density functional theory, material synthesis, device fabrication, and structural and physical property characterizations and modeling. An important project goal is to develop a heterojunction solar cell based on chemically co-doped titania nanotube coated with a solution processed p-type semiconductor.Nontechnical: The project addresses basic research issues in a topical area of materials science with high technological relevance. Energy sustainability is expected to be the main potential benefit to the society of this research project on solar cells. The material systems and devices developed, as well as the fundamental knowledge gained, can be extended to other areas such as solid state lighting, chemical sensing, and flexible electronics. The project provides interdisciplinary training of graduate and undergraduate students.