[13p-P7-1~17] 6.4 Thin films and New materials

[13p-P7-4] The effect of ambient atmosphere on TiO₂/Cu₂O photocathodes prepared
by excimer laser assisted MOD

〇Ryusei Segawa¹, Masami Nishikawa¹, Tomohiko Nakajima², Tetsuo Tsuchiya², Nobuo Saito¹ (1.Nagaoka Univ. of Tech., 2.AIST)

Keywords:photoelectrode

Cu₂O is a promising material as a photocathode to produce H₂ from water under visible-light. However, the self-reduction by photoexcited electrons is a serious problem, resulting in the decline of photcatalytic performance. Before now, we cleared that the composite of a crystalline TiO₂ layer on the Cu₂O photocathode using excimer laser assisted metal organic deposition (ELAMOD) was an effective method to prevent the self-reducction. However, improvement of the crystallinity of TiO₂ is required to raise the photocatalytic performance. In this work, we examined the effect of ambient atmosphere on the TiO₂/Cu₂O photocathode prepared by the ELAMOD process.