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Thermally Robust 0D Cs3EuCl6 Microcrystals for X-Ray Imaging.

Zigen Chai1, Zhicheng Wang2, Dixi Ke1

  • 1Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices, Qianjiang Institute of Industrial Technology, School of Microelectronics, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 5, 2025
PubMed
Summary

New lead-free lanthanide halides, Cs3EuCl6 microcrystals, exhibit intense reddish-orange light emission under blue light. These materials show exceptional thermal stability and anti-thermal quenching for advanced lighting and X-ray imaging applications.

Keywords:
Cs3EuCl6X‐ray imagingblue light excitationreddish‐orange emissionrobust thermal stability

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Optoelectronics

Background:

  • 0D lanthanide-based halides (Cs3LnX6) are promising lead-free perovskites for lighting and X-ray detection.
  • Challenges include extending excitation to blue light and ensuring thermal stability.

Purpose of the Study:

  • To develop 0D Cs3EuCl6 microcrystals for blue light excitation.
  • To investigate their thermal stability and potential for X-ray detection and imaging.

Main Methods:

  • Synthesis of 0D Cs3EuCl6 microcrystals.
  • Characterization of photoluminescence properties under blue light (465 nm).
  • Evaluation of thermal stability, exciton binding energy (Eb), and anti-thermal quenching effects.
  • Assessment of scintillator performance (light yield, radiation resistance) and X-ray imaging capabilities.

Main Results:

  • Cs3EuCl6 microcrystals emit intense reddish-orange light under 465 nm blue light excitation.
  • Exceptional thermal stability and anti-thermal quenching were observed.
  • High exciton binding energy (Eb) and relaxed parity-forbidden 4f-4f transitions contribute to stability.
  • Demonstrated high light yield (12,877 photons MeV-1) and radiation resistance as a scintillator.
  • Achieved high spatial resolution (9.17 lp mm-1) in flexible X-ray imaging films.

Conclusions:

  • 0D Cs3EuCl6 microcrystals offer a stable and efficient solution for blue-light-excited applications.
  • Their properties make them suitable for advanced solid-state lighting, scintillators, and X-ray imaging.
  • The findings pave the way for lead-free optoelectronic and radiation detection devices.