期刊
NATURE PHOTONICS
卷 15, 期 3, 页码 187-192出版社
NATURE PORTFOLIO
DOI: 10.1038/s41566-020-00744-0
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资金
- National Key RAMP
- D Program of China [2020YFA0709900]
- National Natural Science Foundation of China [21975120, 21875104, 91833304, 21973043, 51673095, 61935017]
- Department of Science and Technology of Shaanxi Province [2020GXLH-Z-006]
- Northwestern Polytechnical University [2020GXLH-Z-006]
- Natural Science Fund for Distinguished Young Scholars of Jiangsu Province [BK20180037]
- China National Postdoctoral Program for Innovative Talents [BX20200278]
- Projects of International Cooperation and Exchanges NSFC [51811530018]
- Fundamental Research Funds for the Central Universities
- Agency for Science, Technology and Research (A*STAR) [A1883c0011, A1983c0038]
- King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) [OSR-2018-CRG7-373]
This study presents metal-free organic phosphors with efficient triplet exciton harvesting, exhibiting a low detection limit and potential application in X-ray radiography. These findings offer a promising alternative to incumbent inorganic scintillators and provide opportunities for development of flexible, stretchable X-ray detectors and imagers for non-destructive radiography testing and medical imaging.
Materials that exhibit X-ray-excited luminescence have great potential in radiation detection, security inspection, biomedical applications and X-ray astronomy(1-5). However, high-performance materials are almost exclusively limited to ceramic scintillators, which are typically prepared under high temperatures(6). Herein we report metal-free organic phosphors based on a molecular design that supports efficient triplet exciton harvesting to enhance radioluminescence. These organic scintillators exhibit a detection limit of 33 nGy s(-1), which is 167 times lower than the standard dosage for X-ray medical examination and we demonstrate their potential application in X-ray radiography. These findings provide a fundamental design principle and new route for the creation of promising alternatives to incumbent inorganic scintillators. Furthermore, they offer new opportunities for development of flexible, stretchable X-ray detectors and imagers for non-destructive radiography testing and medical imaging.
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