Structure,morphologyandopticalpropertiesofundopedand MN-doped ZnO(1 x)Sx nano-powderspreparedbyprecipitation method
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Date
2015-08
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The undopedandMn-dopedZnO(1 x)Sx nano-powders weresuccessfullysynthesizedbyprecipitation
method withoutusinganycappingagent.Itsstructure,morphology,elementalanalysis,opticaland
luminescence propertiesweredeterminedbyscanningelectronmicroscopy(SEM),energy-dispersive
X-rayspectroscopy(EDS),UV–vis spectroscopy(UV)andphotoluminescencespectroscopy(PL).Atypical
SEM imageoftheun-dopedZnO(1 x)Sx nanoparticles exhibit flake likestructuresthatchangestonearly
spherical particleswithMn-doping.TheXRDofundopedandMndopedZnO(1 x)Sx patternrevealsthe
formation ofaproductindexedtothehexagonalwurtzitephaseofZnS.Thenanopowdershavecrys-
tallite sizesestimatedfromXRDmeasurementswereintherangeof10–20 nm.Allthesamplesshowed
absorption maximumofZnO(1 x)Sx at 271nmandhightransmittanceinUVandvisibleregion,re-
spectively.TheundopedZnO(1 x)Sx nanoparticles showstrongroom-temperaturephotoluminescence
with fouremissionbandscenteringat338nm,384nm,448nmand705nmthatmayoriginatetothe
impurity ofZnO(1 x)Sx, existenceofoxiderelateddefects.Thecalculatedbandgapofthenanocrystalline
ZnO(1 x)Sx showedablue-shiftwithrespecttotheMn-doping.ThePLspectraoftheMn-dopedsamples
exhibitastrongorangeemissionataround594nmattributedtothe 4T1–6A1 transitionoftheMn2þ ions.
Description
TheauthorssendimmensegratitudetotheSouthAfrica'sNa-
tionalResearchFoundation(NRF),theUniversityoftheFreeState
physicsdepartmentandtheOrganizationfortheProhibitionof
ChemicalWeapons(OPCW)forthe financialassistanceforthis
study.
Keywords
Zinc oxide, Precipitation, Doping, Photoluminescence, Nanomaterials
Citation
PhysicaB480(2016)63–67