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Proceedings Paper

Al-doped ZnO aligned nanorod arrays for opto-electronic and sensor applications
Author(s): T. Holloway; R. Mundle; H. Dondapati; R. B. Konda; M. Bahoura; A. K. Pradhan
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Paper Abstract

We report on the growth of vertically aligned Al:ZnO nanorod arrays synthesized by the hydrothermal technique at considerably low temperature on a sputtered Al:ZnO seed layer. The morphology demonstrates that the nanorod arrays maintain remarkable alignment along the c-axis over a large area. The optoelectronic properties of nanorod arrays on Al:ZnO/p-Si seed layer with SiO2 have been illustrated. The photocurrent is significantly reduced in nanorod arrays on AZO/SiO2/p-Si heterojunction due to multiple scattering phenomena associated with the nanorod arrays. The optical properties of the AZO film with and without the AZO nanorod arrays were investigated. Also the effects of an intermediate layer in the AZO/P-Si heterojunction structure with and without the AZO nanorod array present were explored. All the various intermediate layers displayed photovoltaic effect behavior, especially with the AZO/SiO2/P-Si heterojunction structure, which exhibited ideal diode behavior. The optoelectronic properties of nanorod arrays on AZO/P-Si seed layer with SiO2 have been illustrated. The photocurrent is significantly reduced in nanorod arrays on AZO/SiO2/P-Si heterojunction due to multiple scattering phenomena associated with the nanorod arrays. The results have tremendous impact for sensor fabrication, including glucose sensor.

Paper Details

Date Published: 30 March 2012
PDF: 10 pages
Proc. SPIE 8344, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2012, 83440A (30 March 2012); doi: 10.1117/12.914482
Show Author Affiliations
T. Holloway, Norfolk State Univ. (United States)
R. Mundle, Norfolk State Univ. (United States)
H. Dondapati, Norfolk State Univ. (United States)
R. B. Konda, Norfolk State Univ. (United States)
M. Bahoura, Norfolk State Univ. (United States)
A. K. Pradhan, Norfolk State Univ. (United States)


Published in SPIE Proceedings Vol. 8344:
Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2012
Vijay K. Varadan, Editor(s)

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