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

습식공정을 이용한 ZnS:Mn2+계 QD의 합성 조건에 따른 광 특성 변화 연구

  • 차지민 (한국산업기술대학교 신소재공학과) ;
  • 이윤지 (한국산업기술대학교 신소재공학과) ;
  • 문성철 (한국산업기술대학교 신소재공학과) ;
  • 이성의 (한국산업기술대학교 신소재공학과)
  • Received : 2016.03.15
  • Accepted : 2016.12.15
  • Published : 2017.01.01

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.

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