中国物理B ›› 2019, Vol. 28 ›› Issue (4): 47803-047803.doi: 10.1088/1674-1056/28/4/047803

所属专题: SPECIAL TOPIC — Photodetector: Materials, physics, and applications

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Preparation and photoelectric properties of cadmium sulfide quantum dots

Yue Gu(古月), Libin Tang(唐利斌), Xiaopeng Guo(郭小鹏), Jinzhong Xiang(项金钟), Kar Seng Teng, Shu Ping Lau(刘树平)   

  1. 1 School of Materials Science and Engineering, Yunnan University, Kunming 650091, China;
    2 Kunming Institute of Physics, Kunming 650223, China;
    3 College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, UK;
    4 Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
  • 收稿日期:2018-10-08 修回日期:2018-12-30 出版日期:2019-04-05 发布日期:2019-04-05
  • 通讯作者: Libin Tang, Jinzhong Xiang E-mail:scitang@163.com;jzhxiang@ynu.edu.cn
  • 基金资助:

    Project supported by the Equipment Pre-research Fund under the Equipment Development Department (EDD) of China's Central Military Commission (CMC) (Grant No. 1422030209), the Innovation Team Program of NORINCO Group (Grant No. 2017CX024), and the National Natural Science Foundation of China (Grant Nos. 61106098 and 11864044).

Preparation and photoelectric properties of cadmium sulfide quantum dots

Yue Gu(古月)1, Libin Tang(唐利斌)2, Xiaopeng Guo(郭小鹏)3, Jinzhong Xiang(项金钟)1, Kar Seng Teng3, Shu Ping Lau(刘树平)4   

  1. 1 School of Materials Science and Engineering, Yunnan University, Kunming 650091, China;
    2 Kunming Institute of Physics, Kunming 650223, China;
    3 College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, UK;
    4 Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
  • Received:2018-10-08 Revised:2018-12-30 Online:2019-04-05 Published:2019-04-05
  • Contact: Libin Tang, Jinzhong Xiang E-mail:scitang@163.com;jzhxiang@ynu.edu.cn
  • Supported by:

    Project supported by the Equipment Pre-research Fund under the Equipment Development Department (EDD) of China's Central Military Commission (CMC) (Grant No. 1422030209), the Innovation Team Program of NORINCO Group (Grant No. 2017CX024), and the National Natural Science Foundation of China (Grant Nos. 61106098 and 11864044).

摘要:

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, CdCl2, 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.

关键词: CdS QDs, liquid-phase synthesis, photoelectric properties

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, CdCl2, 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.

Key words: CdS QDs, liquid-phase synthesis, photoelectric properties

中图分类号:  (Quantum dots)

  • 78.67.Hc
84.60.Jt (Photoelectric conversion) 85.60.Gz (Photodetectors (including infrared and CCD detectors))