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  • Received: Feb. 29, 2020

    Accepted: Apr. 16, 2020

    Posted: Jun. 11, 2020

    Published Online: Jun. 12, 2020

    The Author Email: Bobo Yang (, Jun Zou (

    DOI: 10.3788/COL202018.071601

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    Peiyuan Cao, Bobo Yang, Yanrong Cao, Fei Zheng, Jun Zou. Room-temperature synthesis of cyan CsPb(Cl/Br)3/SiO2 nanospheres with LiCl-H2O solution[J]. Chinese Optics Letters, 2020, 18(7): 071601

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Chinese Optics Letters, Vol. 18, Issue 7, 071601 (2020)

Room-temperature synthesis of cyan CsPb(Cl/Br)3/SiO2 nanospheres with LiCl-H2O solution

Peiyuan Cao1, Bobo Yang1,2,**, Yanrong Cao3, Fei Zheng1, and Jun Zou1,4,*

Author Affiliations

  • 1School of Science, Shanghai Institute of Technology, Shanghai 201418, China
  • 2Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
  • 3School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China
  • 4Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou 325024, China


There are many strategies to maintain the excellent photoluminescence (PL) characteristics of perovskite quantum dots (QDs). Here, we proposed a facile and effective method to prepare cyan CsPb(Cl/Br)3/SiO2 nanospheres at room temperature. Cubic CsPb(Cl/Br)3 was obtained by adding a LiCl-H2O solution and anion exchange reaction. With (3-aminopropyl)triethoxysilane as an auxiliary agent, a QDs/SiO2 composite was extracted from a sol-gel solution by precipitate-encapsulation method. The transmission electron microscopy images and Fourier transform infrared spectra indicated the QDs were indeed embedded in silica substances. Besides, humidity stability and thermal stability show the composite possesses a great application value. Finally, cyan QDs@SiO2 powder has a high PL quantum yield of up to 84%; the stable cyan fluorescent powder does have great potential to play a key role in commercial full spectrum display.


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