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TiO2 nanowires sensitized with CdS quantum dots and the surface photovoltage properties |
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| Authors: | Mingxia Xia Yicheng Wang Binsuo Zou Yanguo Wang |
| Affiliation: | a Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, and State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China b Key Laboratory of Low Dimensional Quantum Structures and Quantum Control, Ministry of Education, Hunan Normal University, Changsha 410082, China c Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China |
| Abstract: | TiO2 nanowires prepared by thermal annealing of anodized Ti foil were sensitized with CdS quantum dots (QDs) via chemical bath deposition (CBD). Microstructural characterizations by SEM, TEM and XRD show that the CdS nanocrystals with the cubic structure have intimate contact to the TiO2 nanowires. The amount of CdS QDs can be controlled by varying the CBD cycles. The experiment results demonstrate that the surface photovoltage (SPV) response intensity was significantly enhanced and the surface photovoltage response region was also expanded obviously for the TiO2 NWs sensitized by CdS QDs. |
| Keywords: | TiO2 CdS Nanowires Photovoltage |
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