All-inorganic perovskite nanocrystal scintillators

Qiushui Chen, Jing Wu, Xiangyu Ou, Bolong Huang, Jawaher Almutlaq, Ayan A. Zhumekenov, Xinwei Guan, Sanyang Han, Liangliang Liang, Zhigao Yi, Juan Li, Xiaoji Xie, Yu Wang, Ying Li, Dianyuan Fan, Daniel B. L. Teh, Angelo H. All, Omar F. Mohammed, Osman M. Bakr, Tom Wu, Marco Bettinelli, Huanghao Yang (), Wei Huang () and Xiaogang Liu ()
Additional contact information
Qiushui Chen: National University of Singapore
Jing Wu: School of Science, China University of Geosciences
Xiangyu Ou: MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fuzhou University
Bolong Huang: The Hong Kong Polytechnic University
Jawaher Almutlaq: Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
Ayan A. Zhumekenov: Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
Xinwei Guan: Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
Sanyang Han: National University of Singapore
Liangliang Liang: National University of Singapore
Zhigao Yi: National University of Singapore
Juan Li: MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fuzhou University
Xiaoji Xie: Institute of Advanced Materials, Nanjing Tech University
Yu Wang: SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University
Ying Li: SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University
Dianyuan Fan: SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen University
Daniel B. L. Teh: Singapore Institute for Neurotechnology, National University of Singapore
Angelo H. All: Singapore Institute for Neurotechnology, National University of Singapore
Omar F. Mohammed: Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
Osman M. Bakr: Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
Tom Wu: School of Materials Science and Engineering, University of New South Wales
Marco Bettinelli: Luminescent Materials Laboratory, DB, University of Verona
Huanghao Yang: MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fuzhou University
Wei Huang: Institute of Advanced Materials, Nanjing Tech University
Xiaogang Liu: National University of Singapore

Nature, 2018, vol. 561, issue 7721, 88-93

Abstract: Abstract The rising demand for radiation detection materials in many applications has led to extensive research on scintillators1–3. The ability of a scintillator to absorb high-energy (kiloelectronvolt-scale) X-ray photons and convert the absorbed energy into low-energy visible photons is critical for applications in radiation exposure monitoring, security inspection, X-ray astronomy and medical radiography4,5. However, conventional scintillators are generally synthesized by crystallization at a high temperature and their radioluminescence is difficult to tune across the visible spectrum. Here we describe experimental investigations of a series of all-inorganic perovskite nanocrystals comprising caesium and lead atoms and their response to X-ray irradiation. These nanocrystal scintillators exhibit strong X-ray absorption and intense radioluminescence at visible wavelengths. Unlike bulk inorganic scintillators, these perovskite nanomaterials are solution-processable at a relatively low temperature and can generate X-ray-induced emissions that are easily tunable across the visible spectrum by tailoring the anionic component of colloidal precursors during their synthesis. These features allow the fabrication of flexible and highly sensitive X-ray detectors with a detection limit of 13 nanograys per second, which is about 400 times lower than typical medical imaging doses. We show that these colour-tunable perovskite nanocrystal scintillators can provide a convenient visualization tool for X-ray radiography, as the associated image can be directly recorded by standard digital cameras. We also demonstrate their direct integration with commercial flat-panel imagers and their utility in examining electronic circuit boards under low-dose X-ray illumination.

Keywords: Perovskite Nanocrystals; Radioluminescence; Bulk Scintillator; PDMS Substrate; Perovskite QDs (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (15)

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DOI: 10.1038/s41586-018-0451-1

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