MMIJ & EARTH 2017, Sapporo

Presentation information (2017/08/24 Ver.)

Special Session

EARTH

Thu. Sep 28, 2017 8:45 AM - 11:45 AM C310 (Fl.3.,Build. C)

Chairman: Chompunoot Wiraseranee (Mitsubishi Materials Corporation), Liu Hui (Central South University), Jonghyun Lee (Chungnam National University), Liyuan Chai (Central South University)

9:30 AM - 9:45 AM

[3801-11-04] Electrodeposition of Si films in a CaCl2-based molten salt for cost-effective production of Si solar cells

○Xiao Yang1, Fumitaka Tsukihashi1, Allen J Bard2 (1. Graduate School of Frontier Sciences, The University of Tokyo, 2. Department of Chemistry, The University of Texas at Austin)

Chairman: Chompunoot Wiraseranee (Mitsubishi Materials Corporation), Liu Hui (Central South University)

Keywords:Silicon, Solar cells, Molten salt, CaCl2, Electrodeposition

In order to make solar-based electricity competitive, reducing the manufacturing costs for Si solar cells by means of a kerfless technology is desirable. One promise approach is the direct fabrication of Si thin films from inexpensive Si-based compounds via molten salt electrochemical techniques. Here we demonstrate a novel approach to fabricate high quality crystalline Si thin films by electrodeposition from a CaCl2-based molten salt. The obtained Si film shows a p-type semiconductor character and good photoelectrochemical properties. A p-n juction fabricated from the deposited Si film exhibits apparent photovoltaic effects. This study represents a first move toward the ultimate goal of developing a cost-effective manufacturing process for Si solar cells.

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