NDLI: Study of the Photoconductivity of Zinc Oxide Nanoparticles Synthesized by a Sol

Content Provider	Springer Nature Link
Author	Pandey, Nitin Srivastava, Rajneesh Kumar
Copyright Year	2014
Abstract	ZnO nanoparticles (NPs) were synthesized by use of a sol–gel method at different temperatures, and characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), and UV–visible absorption spectroscopy. XRD analysis showed crystallite size was of the order of few tens of nanometers and the NPs had a wurtzite structure. SEM micrographs showed the NPs were pseudo-spherical in shape. UV–visible absorption study revealed a blue shift of the absorption edge compared with that of bulk ZnO. With increasing temperature of synthesis, the absorption edge was red-shifted. The photoconductivity, in air, of all the samples was studied. Variation of the dark current with applied voltage was linear for NPs synthesized at low temperatures and became super-linear for NPs synthesized at high temperatures. The dark current decreased with increasing temperature of synthesis. Photosensitivity was maximum for NPs synthesized at 600°C. Anomalous behavior, a decrease in photocurrent even during steady illumination, was observed for all the samples.
Starting Page	56
Ending Page	61
Page Count	6
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	44
Issue Number	1
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2014-11-15
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Photoconductivity XRD SEM nanoparticles ZnO Sol–gel Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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