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

技术支持：本计画主要研究奈米线的能带结构、异质接面的能带排列及其对载子注入与传输的影响。该研究旨在通过共掺杂和具有用于太阳能电池的p型半导体异质结的TiO 2表面来设计TiO 2带隙，以增加吸收，通过控制能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，化学和工程的交叉点，涉及密度泛函理论，材料合成，设备制造，结构和物理特性表征和建模。一个重要的项目目标是开发一种异质结太阳能电池的基础上化学共掺杂的二氧化钛纳米管涂有一个解决方案处理的p型半导体。非技术性：该项目解决了材料科学的一个热门领域的基础研究问题，具有高度的技术相关性。能源可持续性预计将是该太阳能电池研究项目对社会的主要潜在利益。开发的材料系统和设备以及获得的基础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产品。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.