Title: The heterojunction effects of TiO2 nanotubes fabricated by atomic layer deposition on photocarrier transportation direction
Authors: Chang, Yung-Huang
Liu, Chien-Min
Chen, Chih
Cheng, Hsyi-En
Department of Materials Science and Engineering
Issue Date: 1-Jan-1970
Abstract: "The heterojunction effects of TiO2 nanotubes on photoconductive characteristics were investigated. For ITO/TiO2/Si diodes, the photocurrent is controlled either by the TiO2/Si heterojunction (p-n junction) or the ITO-TiO2 heterojunction (Schottky contact). In the short circuit (approximately 0 V) condition, the TiO2-Si heterojunction dominates the photocarrier transportation direction due to its larger space-charge region and potential gradient. The detailed transition process of the photocarrier direction was investigated with a time-dependent photoresponse study. The results showed that the diode transitioned from TiO2-Si heterojunction-controlled to ITO-TiO2 heterojunction-controlled as we applied biases from approximately 0 to -1 V on the ITO electrode."
URI: http://dx.doi.org/231
ISSN: 1931-7573
DOI: 231
Volume: 7
End Page: 
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