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Updated: Apr 17, 2026
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Giant Scintillation Yield Enhancement in Zero-Dimensional Halides by Exciton Confinement Manipulation
Yujie Wang1,2, Xuemin Wen1,3, Hongliang Shi4
1State Key Laboratory of Functional Crystals and Devices, ShanghaiInstitute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China.
Copper alloying in low-dimensional halides (LDHs) significantly boosts scintillation yield by localizing excitons. This structural modulation enhances performance for scintillation applications, overcoming previous limitations.
Area of Science:
- Materials Science
- Solid-State Physics
- Radiochemistry
Background:
- Low-dimensional halides (LDHs) show potential for scintillation applications due to self-trapped exciton (STE) emission.
- Current LDHs suffer from low scintillation yields caused by exciton interactions under ionizing radiation, despite high photoluminescence quantum yields (PLQY).
Purpose of the Study:
- To enhance the scintillation yield of zero-dimensional (0D) Cs3YCl6 through structural modulation.
- To investigate the effect of copper(I) alloying on exciton behavior and scintillation properties in Cs3YCl6.
Main Methods:
- First-principles calculations to confirm exciton localization.
- Temperature-dependent photoluminescence spectroscopy.
- Kinetic analysis of exciton dynamics.
Main Results:
- Copper(I) alloying in Cs3YCl6 resulted in the formation of (Cs8Cu)Y3Cl18 with localized excitons within [Cu2(YCl6)3]7- clusters.
- The (Cs8Cu)Y3Cl18 material exhibited a higher energy barrier for STE quenching compared to Cs3YCl6.
- A 460% enhancement in STE-related scintillation yield was observed in (Cs8Cu)Y3Cl18.
Conclusions:
- Structural modulation via copper(I) alloying effectively enhances exciton confinement in 0D LDHs.
- This approach offers a new strategy to significantly improve scintillation yield in LDHs for radiation detection applications.
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