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Related Experiment Video

Updated: Feb 9, 2026

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Size-tunable CsPbBr3 perovskite ring arrays for lasing.

Jingkun Xu1, Shuhong Xu, Zhengqing Qi

  • 1Advanced Photonics Center, Southeast University, Nanjing, 210096, P. R. China. wangchl@seu.edu.cn changguilu@seu.edu.cn.

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|May 31, 2018
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Summary

Researchers developed a new method to create cesium lead bromide (CsPbBr3) ring arrays using colloidal crystal templates. This technique allows precise control over ring size for potential applications in lasers.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Nanocrystal morphology significantly impacts optoelectronic properties.
  • Ring-like nanostructures offer unique internal spaces for chemical loading and field control, distinct from solid morphologies.

Purpose of the Study:

  • To fabricate cesium lead bromide (CsPbBr3) ring arrays.
  • To develop a method for tuning the size of CsPbBr3 ring arrays.
  • To investigate the formation dynamics and potential applications of CsPbBr3 ring arrays.

Main Methods:

  • Utilized 2D colloidal crystal templates for fabricating CsPbBr3 ring arrays.
  • Tuned ring size by altering template dimensions and annealing processes.
  • Observed perovskite ring dynamics during formation and crystallization.

Main Results:

  • Successfully fabricated CsPbBr3 ring arrays with tunable sizes ranging from 2.6 μm to 16.9 μm.
  • Identified two methods for precise control over ring dimensions.
  • Observed a shrinking dynamic of perovskite rings towards template spheres before crystallization.

Conclusions:

  • Developed a facile method for CsPbBr3 ring array fabrication with tunable sizes.
  • Demonstrated the potential of these CsPbBr3 ring arrays in laser applications.