Dual Light Emission of CsSnI3-Based Powders Synthesized via a Mechanochemical Process

Xuan Huang, Xiaobing Tang, Xiyu Wen, Yuebin Charles Lu, Fuqian Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Lead toxicity has hindered the wide applications of lead halide perovskites in optoelectronics and bioimaging. A significant amount of effort has been made to synthesize lead-free halide perovskites as alternatives to lead halide perovskites. In this work, we demonstrate the feasibility of synthesizing CsSnI3-based powders mechanochemically with dual light emissions under ambient conditions from CsI and SnI2 powders. The formed CsSnI3-based powders are divided into CsSnI3-dominated powders and CsSnI3-contained powders. Under the excitation of ultraviolet light of 365 nm in wavelength, the CsSnI3-dominated powders emit green light with a wavelength centered at 540 nm, and the CsSnI3-contained powders emit orange light with a wavelength centered at 608 nm. Both the CsSnI3-dominated and CsSnI3-contained powders exhibit infrared emission with the peak emission wavelengths centered at 916 nm and 925 nm, respectively, under a laser of 785 nm in wavelength. From the absorbance spectra, we obtain bandgaps of 2.32 eV and 2.08 eV for the CsSnI3-dominated and CsSnI3-contained powders, respectively. The CsSnI3-contained powders exhibit the characteristics of thermal quenching and photoelectrical response under white light.

Original languageEnglish
Article number3577
JournalMaterials
Volume17
Issue number14
DOIs
StatePublished - Jul 2024

Bibliographical note

Publisher Copyright:
© 2024 by the authors.

Keywords

  • CsSnI
  • dual light emission
  • lead-free perovskites
  • mechanochemical synthesis

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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