Wednesday Colloquium: Prof. Yanfa Yan, University of Toledo
Title: Understanding the performance of CdTe thin-film solar cells
Abstract: Polycrystalline CdTe is one of the most promising low-cost high-efficiency materials for thin film solar cells. A substantial advance in the record efficiencies of CdTe has occurred recently peaking at 19.6% for the best laboratory cell and 16.1% for the best module. In order to increase the efficiency close to the Shockley-Quiesser limit of ~30%, the nature of the electronic properties of the device need to be better understood. In this presentation, I will review on the current statues and challenges of CdTe technology. In addition, I will introduce the research efforts on CdTe solar cells at The University of Toledo. Particualy, I will present how the combination of materials growth, high-resolution characterization, and density-functional theory can help us understand the performance of polycrystalline CdTe thin-film solar cells.