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http://dx.doi.org/10.4313/JKEM.2017.30.1.42

A Study on Photo-Luminescence Spectrum Properties of ZnS:Mn QD Prepared by Wet-Process  

Cha, Ji Min (Department of Advanced Material, Korea Polytechnic)
Lee, Yoon Ji (Department of Advanced Material, Korea Polytechnic)
Moon, Seong Cheol (Department of Advanced Material, Korea Polytechnic)
Lee, Seong Eui (Department of Advanced Material, Korea Polytechnic)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.30, no.1, 2017 , pp. 42-47 More about this Journal
Abstract
In this study, the physical and optical properties of $ZnS:Mn^{2+}$ Quantum Dot prepared by wet-process condition with Mn/Zn ratio was valuated. The powder characteristics and optical behavior were investigated through XRD, TEM and Photo spectrometer exicted by various UV light source. We found the main peak of ZnS (111) was shifted by 0.8 degree to low angle position with increasing stirring energy from 200 RPM to 600 RPM, which is thought to be the increase of lattice defects during wet process. The photo luminescence at 600 RPM shows also higher blue intensity which is well correlated with XRD results. With increasing Mn/Zn ratio, the PL intensity become higher and shifed by 8.5nm to right side, by the increment of substitutional $Mn^{2+}$ ions.
Keywords
$ZnS:Mn^{2+}$ quantum dot (QD); PL spectrum; Stirring energy; Mn/Zn ratio;
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