Al-doped ZnO aligned nanorod arrays for opto-electronic and sensor applications

T. Holloway; R. Mundle; H. Dondapati; R. B. Konda; M. Bahoura; A. K. Pradhan

doi:10.1117/12.914482

30 March 2012 Al-doped ZnO aligned nanorod arrays for opto-electronic and sensor applications

T. Holloway, R. Mundle, H. Dondapati, R. B. Konda, M. Bahoura, A. K. Pradhan

Proceedings Volume 8344, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2012; 83440A (2012) https://doi.org/10.1117/12.914482
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

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.

Citation Download Citation

T. Holloway, R. Mundle, H. Dondapati, R. B. Konda, M. Bahoura, and A. K. Pradhan "Al-doped ZnO aligned nanorod arrays for opto-electronic and sensor applications", Proc. SPIE 8344, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2012, 83440A (30 March 2012); https://doi.org/10.1117/12.914482

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