期刊
ADVANCED OPTICAL MATERIALS
卷 9, 期 24, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202101194
关键词
anodic aluminum oxide; Cs; Cu-3; I-2; (5); hot pressing; pixelated structure; X-ray imaging
资金
- National Key Research Development Program of China [2016YFB0700702]
- National Natural Science Foundation of China [62004076, 62074066, 61725401, 51702107]
- China Postdoctoral Science Foundation [2020M672333, 2020M682398]
- National Postdoctoral Program for Innovative Talents [BX20200142]
- Shenzhen Fundamental Research Program [JCYJ20200109115212546]
- Fund for Innovative Research Groups of the Natural Science Foundation of Hubei Province [2020CFA034]
- Postdoctoral Innovative Research Position of Hubei Province
A new strategy of embedding metal halide scintillators into anodic aluminum oxide (AAO) has been developed, resulting in high-resolution pixelated scintillator films such as Cs3Cu2I5-AAO with excellent imaging performance. This approach offers a new pathway for high-resolution X-ray imaging.
Scintillators are widely utilized as X-ray imaging detectors. Pixelated scintillator films with optical-waveguide-effect are preferred to realize high-resolution X-ray imaging. However, it remains a great challenge to rapidly fabricate high-resolution pixelated scintillator film. Herein, a new strategy is developed to solve the problem by embedding metal halide scintillators into an anodic aluminum oxide (AAO) via a facile hot-pressing method. Cs3Cu2I5 is selected as the prototype to fabricate pixelated scintillator films with targeted thickness, denoted as Cs3Cu2I5-AAO. The light confinement effect provided by AAO is validated by finite-difference time-domain simulations. In particular, the as-prepared Cs3Cu2I5-AAO film demonstrates higher spatial resolution (10.4 lp mm(-1) at modulation transfer function = 0.2), higher UV and X-ray imaging performances compared to the homogeneous counterpart and commercialized terbium-doped gadolinium oxysulfide. These results can inspire further research on the design of nanostructured metal halide perovskites for high-resolution X-ray imaging.
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