NDLI: Photosensitivity Characterization of Nanostructured Tin Oxide Films and Alternative Photodetector Application

Content Provider	IEEE Xplore Digital Library
Author	Fontana, M. Matias, N. Costa, F.F. Barros, A.C. Oliveira, A.
Copyright Year	2001
Abstract	In this paper, we present an analysis of the photosensitivity property of electrical resistance of nanostructured porous tin oxide films (SnO₂) deposited on Si substrates using a spray method. Based on this property, we propose a new application for this material as an element in a photodetector device. As we verified that the film photosensitivity is influenced by room temperature, to develop a photodetector device, we propose a microcontroller-based algorithm for compensating temperature changes in a certain range. The morphological and chemical structure of the sample films revealed by atomic force microscopy (AFM) and Raman spectroscopy are also discussed. The dynamics of the photodetector have been tested by varying the frequency of light excitation and the temperature of the film. The results show that the device works properly for intermediate ranges of frequency and temperature, but its response degrades as the frequency or temperature rises.
Sponsorship	IEEE Sensors Council
Starting Page	869
Ending Page	874
Page Count	6
File Size	358503
File Format	PDF
ISSN	1530437X
Volume Number	11
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature sensors Photodetectors Temperature measurement Resistance Microcontrollers Bridge circuits tin oxide film ${\hbox {SnO}}_{2}$ photodetector photosensitivity
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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