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2019 Volume 27 Issue 4
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Yue Gu, Libin Tang, Xiaopeng Guo, Jinzhong Xiang, Kar Seng Teng, Shu Ping Lau. 2019: Preparation and photoelectric properties of cadmium sulfide quantum dots, Chinese Physics B, 28(4): 23-28. doi: 10.1088/1674-1056/28/4/047803
Citation: Yue Gu, Libin Tang, Xiaopeng Guo, Jinzhong Xiang, Kar Seng Teng, Shu Ping Lau. 2019: Preparation and photoelectric properties of cadmium sulfide quantum dots, Chinese Physics B, 28(4): 23-28. doi: 10.1088/1674-1056/28/4/047803
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Preparation and photoelectric properties of cadmium sulfide quantum dots

  • School of Materials Science and Engineering, Yunnan University, Kunming 650091, China

  • Kunming Institute of Physics, Kunming 650223, China

  • College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, UK

  • Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China

  • Fund Project: the Equipment Pre-research Fund under the Equipment Development Department (EDD) of China's Central Military Commission (CMC)(Grant 1422030209)%the Innovation Team Program of NORINCO Group(Grant 2017CX024)%the National Natural Science Foundation of China(Grant .61106098 and 11864044)
  • Cadmium sulfide quantum dots (CdS QDs) are widely used in solar cells,light emitting diodes,photocatalysis,and biological imaging because of their unique optical and electrical properties.However,there are some drawbacks in existing preparation techniques for CdS QDs,such as protection of inert gas,lengthy reaction time,high reaction temperature,poor crystallinity,and non-uniform particle size distribution.In this study,we prepared CdS QDs by liquid phase synthesis under ambient room temperature and atmospheric pressure using sodium alkyl sulfonate,CdC12,and Na2S as capping agent,cadmium,and sulfur sources respectively.This technique offers facile preparation,efficient reaction,low-cost,and controllable particle size.The as-prepared CdS QDs exhibited good crystallinity,excellent monodispersity,and uniform particle size.The responsivity of CdS QDs-based photodetector is greater than 0.3 μA/W,which makes them suitable for use as ultra-violet (UV) detectors.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Preparation and photoelectric properties of cadmium sulfide quantum dots

Abstract: Cadmium sulfide quantum dots (CdS QDs) are widely used in solar cells,light emitting diodes,photocatalysis,and biological imaging because of their unique optical and electrical properties.However,there are some drawbacks in existing preparation techniques for CdS QDs,such as protection of inert gas,lengthy reaction time,high reaction temperature,poor crystallinity,and non-uniform particle size distribution.In this study,we prepared CdS QDs by liquid phase synthesis under ambient room temperature and atmospheric pressure using sodium alkyl sulfonate,CdC12,and Na2S as capping agent,cadmium,and sulfur sources respectively.This technique offers facile preparation,efficient reaction,low-cost,and controllable particle size.The as-prepared CdS QDs exhibited good crystallinity,excellent monodispersity,and uniform particle size.The responsivity of CdS QDs-based photodetector is greater than 0.3 μA/W,which makes them suitable for use as ultra-violet (UV) detectors.

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