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p-Cu2O-shell/n-TiO2-nanowire-core heterostucture photodiodes

Tsai, Tsung-Ying and Chang, Shoou-Jinn and Hsueh, Ting-Jen and Hsueh, Han-Ting and Weng, Wen-Yin and Hsu, Cheng-Liang and Dai, Bau-Tong (2011) p-Cu2O-shell/n-TiO2-nanowire-core heterostucture photodiodes. NANOSCALE RESEARCH LETTERS, 6 (1). pp. 1-7. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.nanoscalereslett.com/content/6/1/575

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.

Item Type:Article
Subjects:Physical Science > Photonics
ID Code:11606
Deposited By:M T V
Deposited On:05 Jan 2012 09:39
Last Modified:05 Jan 2012 09:39

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