Nano Archive

W18O49 Nanowires as Ultraviolet Photodetector

Yang, Feng and Huang, Kai and Ni, Shibing and Wang, Qi and He, Deyan (2009) W18O49 Nanowires as Ultraviolet Photodetector. Nanoscale Research Letters, 5 (2). pp. 416-419.



Photodetectors in a configuration of field effect transistor were fabricated based on individual W18O49 nanowires. Evaluation of electrical transport behavior indicates that the W18O49 nanowires are n-type semiconductors. The photodetectors show high sensitivity, stability and reversibility to ultraviolet (UV) light. A high photoconductive gain of 104 was obtained, and the photoconductivity is up to 60 nS upon exposure to 312 nm UV light with an intensity of 1.6 mW/cm2. Absorption of oxygen on the surface of W18O49 nanowires has a significant influence on the dark conductivity, and the ambient gas can remarkably change the conductivity of W18O49 nanowire. The results imply that W18O49 nanowires will be promising candidates for fabricating UV photodetectors.

Item Type:Article
Uncontrolled Keywords:W18O49 nanowires - Field effect transistor - Ultraviolet photodetector - Photoconductive gain - Near-surface depletion region
Subjects:Physical Science > Nanophysics
Physical Science > Nanoelectronics
Physical Science > Photonics
ID Code:8145
Deposited By:Lesley Tobin
Deposited On:22 Mar 2010 15:29
Last Modified:22 Mar 2010 15:29

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