作者
Aozhen Xie, Chathuranga Hettiarachchi, Francesco Maddalena, Marcin E Witkowski, Michał Makowski, Winicjusz Drozdowski, Arramel Arramel, Andrew TS Wee, Stuart Victor Springham, Phan Quoc Vuong, Hong Joo Kim, Christophe Dujardin, Philippe Coquet, Muhammad Danang Birowosuto, Cuong Dang
发表日期
2020/6/24
期刊
Communications Materials
卷号
1
期号
1
页码范围
37
出版商
Nature Publishing Group UK
简介
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 …
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A Xie, C Hettiarachchi, F Maddalena, ME Witkowski… - Communications Materials, 2020