[10p-S203-1~21] 6.3 Oxide electronics

[10p-S203-8] Fabrication of Oxysulfide Photocatalyst : Y₂Ti₂O₅S₂ Thin Film by Pulsed Laser Deposition Method.

〇Keigo Nakamura¹, Naoto Fukatani¹, Daiko Takamatsu¹, Hiromasa Takahashi¹, Shin Yabuuchi¹, Jun Hayakawa¹ (1.Hitachi Ltd.)

Keywords:photocatalyst, oxysulphide, Photoelectrode device

In order to achieve highly efficient water splitting in photocatalytic reactions using sunlight, photocatalysts responsive to visible light are necessary. We focused on Y₂Ti₂O₅S₂ oxysulfides, a visible light responsive photocatalyst. We aim to realize stable and highly efficient water splitting by creating photoelectrode devices using thin films of Y₂Ti₂O₅S₂ on substrates. In this study, the electronic structure of Y₂Ti₂O₅S₂ was analyzed using first-principles calculations and Y₂Ti₂O₅S₂ thin films were prepared by PLD method to control the O and S content.