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Parametric optimisation of core-shell ZnS:Mn/ZnS nanoparticles prepared by ultrasound-controlled wet chemical route

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Title Parametric optimisation of core-shell ZnS:Mn/ZnS nanoparticles prepared by ultrasound-controlled wet chemical route
 
Creator SEN, S
SOLANKI, CS
SHARMA, P
 
Subject Fluorescence
ZnS:Mn nanoparticles
Down-shifting
Doping
Ultrasonication
Electron spin resonance
MN2+-DOPED ZNS NANOPARTICLES
OPTICAL-PROPERTIES
ROOM-TEMPERATURE
QUANTUM DOTS
THIN-FILMS
PHOTOLUMINESCENCE
MN
NANOCRYSTALS
LUMINESCENCE
NANOCLUSTERS
 
Description Core-shell type manganese-doped zinc sulphide nanoparticles ZnS:Mn/ZnS, showing strong absorption of ultraviolet light in the 280-450 nm range and emitting orange-yellow light close to 600 nm, were synthesised for eventual deployment as wavelength down-shifters for solar cells. While most syntheses described in literature employed long reaction times and high reaction/annealing temperatures in excess of 100 degrees C, this work presents a facile low-temperature wet chemical route. Key synthesis parameters including zinc to sulphur ratio, manganese doping percentage, reaction sequence and ultrasonication time - were optimised systematically to achieve optimum orange emission intensity. Nanoparticles with average size similar to 2.3 nm and showing bright orange emission under UV excitation were ultimately achieved. Various characterisation techniques, namely HRTEM, XRD, ICP, ESR, UV-visible absorption spectrometry and fluorescence spectroscopy, were used to probe the nature of the sample. (C) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T15:20:26Z
2014-12-28T15:20:26Z
2014
 
Type Article
 
Identifier JOURNAL OF LUMINESCENCE, 145669-675
0022-2313
1872-7883
http://dx.doi.org/10.1016/j.jlumin.2013.08.026
http://dspace.library.iitb.ac.in/jspui/handle/100/16857
 
Language English