Adjusting the sodium diffusion into CuInGaSe2 absorbers by preheating of Mo/SLG substrates |
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| Institution: | 1. Energy Electronics Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central #2, Ibaraki 305-8568, Japan;2. Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan;1. Department of Electrical Engineering, National Institute of Technology Rourkela, India;2. Department of Electrical and Electronic Engineering, Nanyang Technological University, Singapore;1. Resident Physician, Postgraduate Year II, Geisinger Community Medical Center, Scranton, PA;2. Associate, LaPorta & Associates, Dunmore, PA;1. Department of Economics, University of California, San Diego, United States;2. School of Computer Science, University of Western Australia, Australia;3. Department of Mathematics, University of Auckland, New Zealand;1. International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, No.1 Dai Co Viet, Hanoi, Vietnam;2. Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE), No. 55 Giai Phong, Hanoi, Vietnam;3. Duytan University, No. 3 Quangtrung, Danang, Vietnam |
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| Abstract: | We propose a very simple method to adjust the supply of Na from a Mo/soda-lime glass (SLG) substrate into the overgrown CuInGaSe2(CIGS) layer. Mo/SLG substrates for CIGS solar cells were heated in vacuum (=preheated) before use. Na composition in the finished CIGS films were measured by electron probe microanalysis, in association with the preheating temperature and thickness of the Mo layers. The Na concentration at the surface of the CIGS layers decreased with higher preheating temperature, while the cell performance improved. |
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