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Published on: September 27, 2018
In Situ Growth of Stable (DPPM)2Cu4I4@TPU Flexible Scintillator Films.
Xianming Cai1, Xinxin Miao1, Muhammad Bilal1
1Science and Education Integration College of Energy and Carbon Neutralization, College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Sensors (Basel, Switzerland)
|July 15, 2026
Summary
This study introduces a novel copper(I) halide cluster, (DPPM)2Cu4I4, exhibiting exceptional stability and high luminescence for X-ray scintillation. Flexible scintillator films were developed for advanced X-ray imaging applications.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Solid-State Physics
Background:
- Copper(I) halides offer high luminescence and solution processability for X-ray scintillation.
- Poor stability of traditional copper(I) halides hinders their practical application.
- Development of stable, high-performance X-ray scintillators is crucial for imaging technologies.
Purpose of the Study:
- To synthesize and characterize a novel, stable copper(I) halide-based X-ray scintillator.
- To investigate the photoluminescence properties and radiative recombination mechanisms.
- To develop flexible scintillator films for practical X-ray imaging.
Main Methods:
- Synthesis of a zero-dimensional coordinative cluster, (DPPM)2Cu4I4, via anti-solvent crystallization.
- Photoluminescence spectroscopy to determine quantum yield and analyze recombination mechanisms.
- Incorporation of microcrystals into a thermoplastic polyurethane matrix for film fabrication.
Main Results:
- The (DPPM)2Cu4I4 cluster exhibits a high photoluminescence quantum yield (91.11%) and emits orange light.
- Spectroscopic analysis indicates self-trapped-exciton dominated radiative recombination.
- The material demonstrates excellent thermal (≈362 °C), solvent, and air stability (>60 days).
- Flexible scintillator films achieved a high light yield (17,064 photons MeV-1) and spatial resolution (14 lp mm-1).
Conclusions:
- The developed (DPPM)2Cu4I4 cluster addresses the stability limitations of copper(I) halides.
- The flexible scintillator films show significant potential for practical X-ray imaging.
- This work paves the way for advanced, durable X-ray detection materials.
