[17a-Z04-1~11] 1.1 Interdisciplinary and General Physics

▲ [17a-Z04-3] A design study of TiO₂/n-Si energy band structure for charge carrier transportation in water splitting electrode

〇(D)Vytautas Kavaliunas^1,2, Yoshinori Hatanaka¹, Giedrius Laukaitis², Hidenori Mimura¹ (1.Shizuoka Univ., 2.Kaunas Univ. of Tech)

Keywords:Titanium dioxide, Photocatalysis, Water splitting electrode

The present work aims to design a semiconductor system for an effective charger carrier separation and transportation process in a water splitting electrode. Therefore, a conduction band discontinuity between anatase phase titanium dioxide (A-TiO₂) and n-type silicon (n-Si) was investigated in this study. According to the results, having a low doped n-Si substrate, only charger transfer from TiO₂ to n-Si is possible. With increased dopant density, the depletion layer narrows and enables the tunneling effect which allows a current flow both directions without knee and breakdown voltage (ohmic contact).