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Solution-Processed Tin-Based Perovskite for Near-Infrared Lasing.

Guichuan Xing1, Mulmudi Hemant Kumar2,3, Wee Kiang Chong1

  • 1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.

Advanced Materials (Deerfield Beach, Fla.)
|July 16, 2016
PubMed
Summary
This summary is machine-generated.

Solution-processed tin-based perovskites offer a superior near-infrared gain medium. These lead-free materials provide stable, coherent light emission with low thresholds, paving the way for advanced optical applications.

Keywords:
bimolecular recombinationlight-emitting diodesnear-infrared lasingperovskitestrap-states engineeringultrafast spectroscopy

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Photonics

Background:

  • Tin-based perovskites are emerging materials with potential optoelectronic applications.
  • Developing efficient and stable gain media is crucial for advanced laser and amplifier technologies.

Purpose of the Study:

  • To demonstrate solution-processed tin-based perovskites as a novel and high-performance near-infrared gain medium.
  • To investigate the factors contributing to the enhanced optical properties of these perovskites.

Main Methods:

  • Fabrication of tin-based perovskite thin films using solution-processing techniques.
  • Characterization of optical gain properties, including emission spectra and thresholds.
  • Analysis of material properties, such as recombination dynamics and trap density, with and without SnF2 treatment.

Main Results:

  • Tin-based perovskites exhibit stable coherent light emission in the near-infrared spectrum, extending to approximately 1 μm.
  • The materials demonstrate remarkably low lasing thresholds.
  • SnF2 treatment was found to reduce trap density, enhancing material stability and performance.
  • Large electron-hole bimolecular recombination was identified as a key factor in the gain mechanism.

Conclusions:

  • Solution-processed tin-based perovskites represent a promising, lead-free alternative for near-infrared gain media.
  • The observed low thresholds and stable emission highlight their potential for practical photonic devices.
  • Understanding and controlling recombination dynamics and trap states are critical for optimizing tin-based perovskite performance.