Journal
ADVANCED OPTICAL MATERIALS
Volume 10, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202102232
Keywords
scintillators; ball-milling; spatial resolution
Categories
Funding
- National Key Research and Development Program of China [2016YFA0202403/2017YFA0204800]
- National Natural Science Foundation of China [61604091/91733301]
- Funded Projects for the Academic Leaders and Academic Backbones, Shaanxi Normal University [18QNGG009]
- National University Research Fund [GK201603107/GK201803038/GK202003041]
- DNL Cooperation Fund CAS [DNL180311]
- 111 Project [B14041]
- Changjiang Scholars and Innovative Research Team [IRT_14R33]
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Cu3Cu2I5 powder prepared by ball milling exhibits high photoluminescence quantum yield and narrow emission peak, making it suitable for fabricating high scintillation yield Cu3Cu2I5-PDMS flexible film. The film shows extended carrier lifetime and high spatial resolution, demonstrating good stability in X-ray imaging.
Cu halide materials with low electronic dimension show great scintillation properties with high photoluminescence quantum yield (PLQY) and large Stokes shift, which can result in reabsorption-free scintillators. However, there is still a need for a large-scalable method to fabricate large amount of scintillation powder and large-size scintillation films. In this regard, a high scintillation yield Cu3Cu2I5-PDMS flexible film utilizing ball-milled Cu3Cu2I5 powder is developed. The ball-milled Cu3Cu2I5 powder shows a high PLQY of 74.5%, narrow emission peak of 80 nm and good ambient stability, demonstrating the potential of ball-milling method for large-scale scintillator production. Furthermore, the Cu3Cu2I5-PDMS film shows even high PLQY exceeding 90%, which may be ascribed to the passivation effect of PDMS resulting in a little longer carrier lifetime. The flexible Cu3Cu2I5-PDMS film can further deliver high spatial resolution of 6.8 lp mm(-1)@0.2 MTF in X-ray imaging and good stability under steady X-ray illumination. This work demonstrates that the ball-milling method could be an effective approach for large-scale fabrication of low electronic dimensional scintillation materials.
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