title: p-Cu2O-shell/n-TiO2-nanowire-core heterostucture photodiodes.
abstract: This study reports the deposition of cuprous oxide [Cu2O] onto titanium dioxide [TiO2] nanowires [NWs] prepared on TiO2/glass templates. The average length and average diameter of these thermally oxidized and evaporated TiO2 NWs are 0.1 to 0.4 μm and 30 to 100 nm, respectively. The deposited Cu2O fills gaps between the TiO2 NWs with good step coverage to form nanoshells surrounding the TiO2 cores. The p-Cu2O/n-TiO2 NW heterostructure exhibits a rectifying behavior with a sharp turn-on at approximately 0.9 V. Furthermore, the fabricated p-Cu2O-shell/n-TiO2-nanowire-core photodiodes exhibit reasonably large photocurrent-to-dark-current contrast ratios and fast responses.
authors: National Nano Device Laboratories, Tainan, 741, Taiwan, PR China. tj.hsueh@gmail.com.
authors: Tsung-Ying
authors: TY
authors: Tsai
authors: Shoou-Jinn
authors: SJ
authors: Chang
authors: Ting-Jen
authors: TJ
authors: Hsueh
authors: Han-Ting
authors: HT
authors: Hsueh
authors: Wen-Yin
authors: WY
authors: Weng
authors: Cheng-Liang
authors: CL
authors: Hsu
authors: Bau-Tong
authors: BT
authors: Dai