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Updated: Dec 15, 2025

A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
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Temperature-Dependent Circularly Polarized Luminescence Measurement Using KBr Pellet Method.

Yoshiro Kondo1, Satoko Suzuki1, Masayuki Watanabe1

  • 1JASCO Corporation, Hachioji, Japan.

Frontiers in Chemistry
|July 14, 2020
PubMed
Summary

Circularly polarized luminescence (CPL) spectroscopy is crucial for chiral molecule analysis. This study introduces methods for measuring CPL in solid-state samples, even at high temperatures, addressing practical device applications.

Keywords:
CPLKBr pelleteuropium complexsolid-state CPL measurementtemperature-dependent CPL measurements

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Area of Science:

  • Chiroptical spectroscopy
  • Photophysics
  • Materials science

Background:

  • Circularly polarized luminescence (CPL) spectroscopy analyzes chiral molecules in their excited state.
  • CPL applications are expanding into 3D displays and molecular analysis.
  • High sensitivity and artifact-free measurements are critical due to low luminescence dissymmetry factors in organic compounds.

Purpose of the Study:

  • To enable CPL spectroscopy measurements of solid-state samples for device applications.
  • To evaluate the thermal dependence of CPL characteristics in solid-state samples.
  • To develop methods for assessing and mitigating artifacts caused by sample anisotropy.

Main Methods:

  • Development of techniques for measuring CPL spectra of solid-state samples.
  • High-temperature CPL measurements to assess thermal stability.
  • Evaluation of sample anisotropy to prevent measurement artifacts.

Main Results:

  • Demonstration of methods for anisotropy evaluation in solid-state CPL measurements.
  • Successful high-temperature CPL characterization of solid-state samples.
  • Insights into the thermal behavior of CPL properties for device optimization.

Conclusions:

  • The developed methods facilitate CPL analysis of solid-state chiral materials.
  • High-temperature CPL measurements are essential for evaluating practical device performance.
  • Addressing sample anisotropy is key for accurate CPL spectroscopy of solid-state samples.