放射发光
闪烁体
钙钛矿(结构)
发光
材料科学
X射线
光子
辐照
光学
结晶学
光电子学
放射化学
物理
化学
核物理学
探测器
作者
Ming Li,Yumin Wang,Liangwei Yang,Zhifang Chai,Yaxing Wang,Shuao Wang
标识
DOI:10.1002/anie.202208440
摘要
Scintillators display radioluminescent properties when irradiated by high-energy photons and therefore play an essential role in radiation detection. The current inventory of scintillators is overwhelmingly represented by achiral structures, where the radioluminescence propagates isotropically after generation. Herein, we demonstrate that chiral perovskites of (R-3AP)PbBr3 Cl⋅H2 O (R-3APP) and (S-3AP)PbBr3 Cl⋅H2 O (S-3APP) emerge as a new type of scintillator displaying a distinct property of circularly polarized radioluminescence (CPRL). A high quantum yield of 27.6 %, high luminescence dissymmetric factors (glum ) of 4×10-2 , and high X-ray absorption coefficients were observed for these compounds. As proof of concept, we fabricated a polarized scintillator pair by assembling chiral scintillator crystals, which provides a new strategy to attenuate optical crosstalk between the scintillators by precisely controlling the radioluminescence propagation and improves the X-ray imaging quality at the boundary region.
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