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Tunable blue-green emission from ZnS(Ag) nanostructures grown by hydrothermal synthesis

Published online by Cambridge University Press:  05 November 2018

Manjula Sharma ,
Shashwati Sen ,
Jagannath Gupta ,
M. Ghosh ,
S. Pitale ,
Vinay Gupta  and
S.C. Gadkari
Manjula Sharma
Affiliation:
Technical Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India; and Department of Physics and Astrophysics, University of Delhi, New Delhi 110007, India
Shashwati Sen*
Affiliation:
Technical Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
Jagannath Gupta
Affiliation:
Technical Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
M. Ghosh
Affiliation:
Technical Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
S. Pitale
Affiliation:
Technical Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
Vinay Gupta
Affiliation:
Department of Physics and Astrophysics, University of Delhi, New Delhi 110007, India
S.C. Gadkari
Affiliation:
Technical Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
*
a)Address all correspondence to this author. e-mail: shash@barc.gov.in
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Abstract

We report the synthesis and optical properties of pure ZnS and Ag doped ZnS nanostructures. ZnS(Ag) was synthesized by using the hydrothermal technique and later annealed at different temperatures under vacuum conditions. It was observed that the photoluminescence (PL) emission from the ZnS(Ag) nanostructures can be easily tuned from the blue (445 nm) to green (530 nm) region of visible light by varying the annealing temperature. This tunability has been attributed to the introduction of excess sulfur vacancy states, which is evident from the PL excitation spectra. This observed change in the PL emission wavelength can be highly beneficial in the imaging screens where ZnS is regularly used and can be easily interfaced with the silicon photodiodes showing maximum sensitivity at 550 nm.

Keywords

hydrothermalsemiconductingluminescence
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 23 , 14 December 2018 , pp. 3963 - 3970
Copyright
Copyright © Materials Research Society 2018 

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References

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