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Fabrication of Nanostructured ZnO UV Sensor

Published online by Cambridge University Press:  01 February 2011

Shiva S. Hullavarad ,
N. V. Hullavarad ,
M. Mooers  and
P. C. Karulkar
Shiva S. Hullavarad
Affiliation:
fnssh1@uaf.edu, UNIVERSITY OF ALASKA FAIRBANKS, OFFICE OF ELECTRONIC MINIATURIZATION, 3330 INDUSTRIAL AVENUE, FAIRBANKS, AK, 99701, United States, 907-455-2017, 907-455-2019
N. V. Hullavarad
Affiliation:
FFNVH@UAF.EDU, UNIVERSITY OF ALASKA FAIRBANKS, OFFICE OF ELECTRONIC MINIATURIZATION, 3330 INDUSTRIAL AVENUE, FAIRBANKS, AK, 99701, United States
M. Mooers
Affiliation:
FSMHM2@UAF.EDU, UNIVERSITY OF ALASKA FAIRBANKS, OFFICE OF ELECTRONIC MINIATURIZATION, 3330 INDUSTRIAL AVENUE, FAIRBANKS, AK, 99701, United States
P. C. Karulkar
Affiliation:
pramod.karulkar@uaf.edu, UNIVERSITY OF ALASKA FAIRBANKS, OFFICE OF ELECTRONIC MINIATURIZATION, 3330 INDUSTRIAL AVENUE, FAIRBANKS, AK, 99701, United States
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Abstract

In this paper we describe the fabrication of nanostructure based ZnO ultra violet sensor by a simple route without involving the clean room processing of inter digitized electrodes. The ZnO nanostructures consist of micro spheres of dimension 600 nm- 2 microns embedded in the network of nanowires of dimension 40 nm. The optical properties are studied by Photoluminescence spectroscopy that revealed the exciton band gap of 3.2 eV at 383 nm. The ultra violet sensors exhibit 2 orders of UV to visible rejection ratio. The photo response of Ultra violet sensors as a function of electrode spacing will be discussed.

Keywords

nanostructuresemiconductingsensor

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References

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