简介: |
Abstract
In recent years, Cu(In,Ga)Se2 (CIGS)-based thin-film solar cells have been of great interest for its high conversion efficiency among all thin-film polycrystalline solar cells. Efficiency over 20% has been achieved by three-stage co-evaporation in laboratory scale. In industry, post-selenization of metallic precursors has drawn more attention due to its feasibility for mass-production with mini-module efficiency over 17% and the large capacity (0.9 GW) announced by Solar Frontier. In general, high performance CIGS cells are fabricated under the conditions with sufficient or even excess Se supply. However, excess supply of Se usually causes the complication for the mass production, for example, the maintenance of the processing chamber due to the Se residual or the environmental concern due to the toxicity of H2Se. To address these issues and to simplify the fabrication process, we demonstrate a simple approach by sputtering from a single quaternary target with the cell efficiency of 11% without any post treatment. By using multiple targets for band engineering, we can further increase the cell efficiency to 13 %. In this talk, we will discuss the effects of target composition, Na incorporation and Se content on the CIGS cell performance by using this novel one-step sputtering process.
Resume: Chih-Huang Lai (賴志煌)
Prof. Chih-Huang Lai is carrying out research projects on ultra-high density recording media, spintronics devices, and CIGS solar cells. He received a bachelor degree of Materials Science and Engineering (MSE) from Tsing Hua University at Hsinchu in 1988 and a PhD degree of MSE from Stanford University in 1997. He is currently the chair of MSE department of Tsing Hua University at Hsinchu, Chair Professor of Hsinchu Tsing Hua University, Fellow of MRS-T, President of Taiwan Association for Magnetic Technology, and Member of Editorial board of Asia Materials (Nature Publisher).
|
