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Ting He, Na Dong, Yi Yao, Faqiang Xu. Systematic Studies on CsSnBr3 Perovskite Microcrystals: CVD Growth, Structure, Stability and Optical Properties[J]. Chinese Journal of Chemical Physics .
Citation: Ting He, Na Dong, Yi Yao, Faqiang Xu. Systematic Studies on CsSnBr3 Perovskite Microcrystals: CVD Growth, Structure, Stability and Optical Properties[J]. Chinese Journal of Chemical Physics .

Systematic Studies on CsSnBr3 Perovskite Microcrystals: CVD Growth, Structure, Stability and Optical Properties

  • Received Date: 2021-03-23
  • Accepted Date: 2021-05-28
  • Rev Recd Date: 2021-05-17
  • Available Online: 2021-06-03
  • Although lead-based halide perovskites have promising applications in optoelectronic devices, these applications are limited by the toxicity of the materials. Therefore, it is necessary to develop lead-free all-inorganic substitute such as tin-based halide perovskites in spite of the enormous challenges in their controllable synthesis and stability. Here, we report the controlled growth of high quality CsSnBr<sub>3</sub> microcrystals on SiO<sub>2</sub>/Si substrates by chemical vapor deposition method. The as-prepared products predominantly show the morphology of triangle star and nail-like rod and the structure of cubic phase. The control of nucleation density and size of CsSnBr<sub>3</sub> microcrystals has been realized by varying the growth temperature. The results of air-exposed samples provide direct evidences for explaining the structural instability of the tin-based perovskites, which is attributed to the production of SnO. The power and temperature dependent photoluminescence spectra reveal that CsSnBr<sub>3</sub> microcrystals with different morphologies possess different exciton binding energies and produce different photoexcitation species due to the quantum confinement effect that changes the electron-hole effect.

     

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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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