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Temperature-Dependent Lasing of CsPbI3 Triangular Pyramid.

Liu Yang1, Zhongqi Li1, Chang Liu1

  • 1State Key Laboratory of Superhard Materials & School of Physics , Jilin University , Changchun 130012 , China.

The Journal of Physical Chemistry Letters
|October 31, 2019
PubMed
Summary

This study evaluates microsized single-crystal cesium lead iodide (CsPbI3) triangular pyramids for lasing performance. These perovskite microstructures demonstrate temperature-dependent lasing thresholds, offering insights for optoelectrical device development.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Quantum Optics

Background:

  • Cesium lead iodide (CsPbI3) is a promising perovskite material for optoelectronic applications.
  • Microsized optical cavities are crucial for investigating light-matter interactions.
  • Understanding lasing properties of microstructures is key for device optimization.

Purpose of the Study:

  • To evaluate the lasing performance of microsized single-crystal CsPbI3 triangular pyramids (MSCTPs).
  • To investigate the temperature dependence of the lasing threshold in MSCTPs.
  • To explore the potential of MSCTPs in optoelectrical devices and quantum optics research.

Main Methods:

  • Synthesis of well-defined MSCTPs on Si/SiO2 substrates using chemical vapor deposition.
  • Measurement of spontaneous and stimulated emission spectra.
  • Determination of lasing thresholds at low temperatures (148-223 K).

Main Results:

  • MSCTPs exhibit spontaneous emission around 719 nm at room temperature.
  • Stimulated emission was observed in a single Fabry-Perot mode between 148-223 K.
  • Lasing threshold ranges from 21.56 to 53.15 μJ/cm², showing temperature dependence explained by exciton binding and thermal energy competition.

Conclusions:

  • MSCTPs demonstrate viable lasing characteristics with a notable temperature dependence.
  • The findings provide a pathway for engineering perovskite-based optoelectrical devices.
  • This work facilitates further investigation of light-matter interactions in microsized optical cavities.