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Related Experiment Video

Updated: Sep 16, 2025

Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
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Ultrastable lasing from perovskite colloidal nanocrystals.

Xueyang Li1, Yuxi Jia2, Meng Liu1,3

  • 1State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China.

Science Advances
|July 9, 2025
PubMed
Summary
This summary is machine-generated.

Stable green lasing was achieved using lead halide perovskite nanocrystals in a liquid medium. This breakthrough offers over 10 days of continuous operation, overcoming previous stability limitations for perovskite lasers.

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Nanotechnology

Background:

  • Lead halide perovskites show promise for optoelectronic devices like lasers.
  • Perovskite stability, especially under lasing conditions, is a significant challenge.
  • Previous perovskite lasers had limited operational lifetimes.

Purpose of the Study:

  • To develop stable and long-lasting perovskite-based lasers.
  • To investigate the lasing performance of colloidal perovskite nanocrystals in a liquid.
  • To explore tunable lasing across the visible spectrum using different perovskite compositions.

Main Methods:

  • Fabrication of a Fabry-Pérot cavity containing colloidal CsPbBr3 perovskite nanocrystals in liquid.
  • Excitation of the nanocrystals using nanosecond laser pulses.
  • Transient absorption spectroscopy to measure gain lifetime and efficiency.
  • Demonstration of deep-red lasing using CsPbI3 nanocrystals.

Main Results:

  • Remarkably stable green lasing achieved from CsPbBr3 nanocrystals for over 10 days.
  • Optical power efficiency enhanced to 4.2% using a double-pulse excitation scheme.
  • Demonstrated feasibility of tunable liquid lasers across the visible spectrum with CsPbI3 nanocrystals.

Conclusions:

  • Colloidal perovskite nanocrystals in liquids offer a stable platform for lasing applications.
  • The double-pulse excitation scheme significantly improves laser efficiency.
  • Perovskite liquid lasers are a viable technology for tunable light sources across the visible spectrum.