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Title: Lithium-doped two-dimensional perovskite scintillator for wide-range radiation detection
Authors: Xie, Aozhen
Hettiarachchi, Chathuranga
Maddalena, Francesco
Witkowski, Marcin E.
Makowski, Michal
Drozdowski, Winicjusz
Arramel, Arramel
Wee, Andrew T. S.
Springham, Stuart Victor
Vuong, Phan Quoc
Kim, Hong Joo
Dujardin, Christophe
Coquet, Philippe
Birowosuto, Muhammad Danang
Dang, Cuong
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Xie, A., Hettiarachchi, C., Maddalena, F., Witkowski, M. E., Makowski, M., Drozdowski, W., Arramel, A., Wee, A. T. S., Springham, S. V., Vuong, P. Q., Kim, H. J., Dujardin, C., Coquet, P., Birowosuto, M. D. & Dang, C. (2020). Lithium-doped two-dimensional perovskite scintillator for wide-range radiation detection. Communications Materials, 1(1).
Project: MOE2017-T1-002-142 
Journal: Communications Materials 
Abstract: Two-dimensional lead halide perovskites have demonstrated their potential as high-performance scintillators for X- and gamma-ray detection, while also being low-cost. Here we adopt lithium chemical doping in two-dimensional phenethylammonium lead bromide (PEA)2PbBr4 perovskite crystals to improve the properties and add functionalities with other radiation detections. Li doping is confirmed by X-ray photoemission spectroscopy and the scintillation mechanisms are explored via temperature dependent X-ray and thermoluminescence measurements. Our 1:1 Li-doped (PEA)2PbBr4 demonstrates a fast decay time of 11 ns (80%), a clear photopeak with an energy resolution of 12.4%, and a scintillation yield of 11,000 photons per MeV under 662 keV gamma-ray radiation. Additionally, our Li-doped crystal shows a clear alpha particle/gamma-ray discrimination and promising thermal neutron detection through 6Li enrichment. X-ray imaging pictures with (PEA)2PbBr4 are also presented. All results demonstrate the potential of Li-doped (PEA)2PbBr4 as a versatile scintillator covering a wide radiation energy range for various applications.
ISSN: 2662-4443
DOI: 10.1038/s43246-020-0038-x
Schools: School of Electrical and Electronic Engineering 
National Institute of Education 
Rights: © The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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