Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis and analysis CdSe/ZnS quantum dot with a Core/shell Continuous Synthesis System Using a Microfluidic Reactor

미세유체반응기를 이용한 core/shell 연속 합성 시스템을 이용한 CdSe/ZnS 양자점 합성 및 분석

  • Hong, Myung Hwan (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE)) ;
  • Joo, So Young (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE)) ;
  • Kang, Lee-Seung (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE)) ;
  • Lee, Chan Gi (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
  • 홍명환 (고등기술연구원 신소재공정센터) ;
  • 주소영 (고등기술연구원 신소재공정센터) ;
  • 강이승 (고등기술연구원 신소재공정센터) ;
  • 이찬기 (고등기술연구원 신소재공정센터)
  • Received : 2018.04.04
  • Accepted : 2018.04.25
  • Published : 2018.04.28
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Abstract

Core/shell CdSe/ZnS quantum dots (QDs) are synthesized by a microfluidic reactor-assisted continuous reactor system. Photoluminescence and absorbance of synthesized CdSe/ZnS core/shell QDs are investigated by fluorescence spectrophotometry and online UV-Vis spectrometry. Three reaction conditions, namely; the shell coating reaction temperature, the shell coating reaction time, and the ZnS/CdSe precursor volume ratio, are combined in the synthesis process. The quantum yield of the synthesized CdSe QDs is determined for each condition. CdSe/ZnS QDs with a higher quantum yield are obtained compared to the discontinuous microfluidic reactor synthesis system. The maximum quantum efficiency is 98.3% when the reaction temperature, reaction time, and ZnS/CdSe ratio are $270^{\circ}C$, 10 s, and 0.05, respectively. Obtained results indicate that a continuous synthesis of the Core/shell CdSe/ZnS QDs with a high quantum efficiency could be achieved by isolating the reaction from the external environment.

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