Chinese Journal of Applied Chemistry

Chinese Journal of Applied Chemistry

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Preparation of CsPbX3(X=Cl,Br,I) Perovskite Quantum Dots with Multicolor and High Luminescence Efficiency and Its Application in Light Emitting Diode Devices

HUANG Guobina,LUO Dengfenga,ZHANG Maoshengab*()   

  1. aSchool of Chemistry,Chemical Engineering and Environment
    bFujian Province University Key Laboratory of Analytical Science,Minnan Normal University,Zhangzhou,Fujian 363000,China
  • Received:2019-01-17 Published:2019-08-01
  • Contact: ZHANG Maosheng
  • Supported by:
    Supported by the Natural Science Foundation of Fujian Province, China(No.2013J01062), Science and Technology Projects of the Education Department, Fujian Province of China(No.JK2017032), the Natural Science Foundation of Zhangzhou City, China(No.ZZ2016J30), the Natural Science Foundation of Minnan Normal University(No.Mk201721)

Abstract:

Highly efficient and polychromatic luminescent CsPbX3 perovskite quantum dots(PQDs) were synthesized under room temperature. The entire reaction is very fast and simple. Polychromatic luminescence of CsPbX3 PQDs can be achieved by adjusting different halide compositions(Cl, Br, I). The as-prepared CsPbX3 PQDs have a cubic morphology with an average size about 10 nm. The photoluminescence of CsPbX3 PQDs has a characteristic of wide visible spectral region of 410~630 nm, narrow emission line-widths of 14~38 nm and quantum yields of 10%~90%. Finally, the CsPbX3 PQDs are successfully applied to prepare light emitting diode(LED) devices. At a constant voltage work for a long time, the emission color, intensity, and color coordinates of the LED device remain unchanged.

Key words: perovskites, quantum dots, luminescence, room temperature synthesis method, light emitting diode

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