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Aqueous-Based Inorganic Colloidal Halide Perovskites Customizing Liquid Scintillators.

Huiwang Lian1, Wenxia Zhang2, Rui Zou1

  • 1Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.

Advanced Materials (Deerfield Beach, Fla.)
|September 18, 2023
PubMed
Summary

Researchers developed new perovskite-based aqueous liquid scintillators (AbLS) with significantly improved light yield. These PAbLS offer enhanced performance for high-energy ray radiation detection.

Keywords:
aqueous perovskiteaqueous-based liquid scintillatorsstabilityvacancy inhibitors

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Area of Science:

  • Materials Science
  • Nuclear Instrumentation

Background:

  • Aqueous-based liquid scintillators (AbLS) offer scalability but suffer from low light yield (≈100 photons MeV⁻¹).
  • Existing AbLS are limited in performance for sensitive radiation detection applications.

Purpose of the Study:

  • To synthesize novel aqueous-based inorganic colloidal halide perovskites with high photoluminescence quantum yield (PLQY).
  • To fabricate a new generation of perovskite-mediated AbLS (PAbLS) with enhanced light yield and stability.

Main Methods:

  • Synthesis of colloidal halide perovskites with high PLQY (up to 96%) for red, green, and blue luminescence.
  • Modification using poly(ethylene glycol) to improve dispersion, inhibit vacancies, and ensure defect-free surfaces in aqueous solution.
  • Fabrication and characterization of PAbLS, evaluating light yield, stability, radiation hardness, and operating temperature range.

Main Results:

  • Achieved high PLQY for primary colors (88.1% red, 96% green, 81.8% blue).
  • PAbLS demonstrated significantly increased light yield (3058 photons MeV⁻¹ at room temp, 8037 photons MeV⁻¹ at low temp) compared to commercial AbLS.
  • High luminescent emission stability maintained for 100 days at low temperatures; customizable operating temperatures even below 0 °C.
  • Exhibited robust radiation hardness (up to 23 mGy s⁻¹) and scalability.

Conclusions:

  • Poly(ethylene glycol) modification is key to achieving high PLQY and stable dispersion of halide perovskites in aqueous solutions.
  • The developed PAbLS represent a significant advancement in liquid scintillator technology, overcoming previous limitations in light yield and stability.
  • PAbLS show strong potential for 360° high-energy ray radiation detection due to their superior performance and customizable properties.