Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (3): 279-283.DOI: 10.15541/jim20170140

• Orginal Article • Previous Articles     Next Articles

Preparation and Property of CuInS2/ZnS Core-shell Quantum Dots in Aqueous Phase

ZHOU Bei-Ying, CHEN Dong, LIU Jia-Le, JIANG Wan, LUO Wei, WANG Lian-Jun   

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
  • Received:2017-03-28 Revised:2017-07-05 Published:2018-03-20 Online:2018-03-12
  • About author:ZHOU Bei-Ying. E-mail: zhoujio@126.com
  • Supported by:
    National Natural Science Foundation of China (51272042)

Abstract:

Owing to the absence of Cd, Pb, Te and other toxic elements, and the widely tunable fluorescence emission spectra from visible to near infrared light, CuInS2 quantum dots (QDs), as a new type of I-III-VI semiconductor materials, have been applied in biological detection and analysis imaging. In this study a fast and low temperature method was proposed to synthesize CuInS2 and its ZnS core-shell structure QDs with low toxicity raw materials. The ZnS outer layer suppresses the surface defects to improve the luminescence properties of CuInS2 QDs, and further reduces biological toxicity. CuInS2 QDs exhibited an obvious emission peak at 530 nm when the molar ratio of Cu∶In was 1∶1. With the increase of In content, the luminescence peak presents a gradual redshift. After coated with ZnS shell, the luminous intensity of QDs obviously increased and the emission peak red shifted. Further more, when the molar ratio of Cu∶Zn was 1∶1 and the reflux time was 45 min, the luminescent properties of the synthesized CuInS2/ZnS QDs were optimized. This synthesis method takes the advantages of energy saving, high production efficiency, and excellent environmental friendship, showing wide application potential.

 

Key words: CuInS2, CuInS2/ZnS, core-shell structure, aqueous phase

CLC Number: