Photoluminescence and scintillation properties of organic-inorganic layered perovskite-type compounds (FC6H4C2H4NH3)2PbCl4 crystals
Photoluminescence and scintillation properties of organic-inorganic layered perovskite-type compounds (FC6H4C2H4NH3)2PbCl4 crystals
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DOI：
10.1016/j.optmat.2023.113440
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发表时间：
2023-02
影响因子：
3.9
通讯作者：
Shunji Matsuzawa;Kai Okazaki;D. Nakauchi;N. Kawano;Takeru Suto;Takumi Kato;N. Kawaguchi;T. Yanagida
中科院分区：
文献类型：
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作者：
Shunji Matsuzawa;Kai Okazaki;D. Nakauchi;N. Kawano;Takeru Suto;Takumi Kato;N. Kawaguchi;T. Yanagida
采用缓冷法生长了(C6H5C2H4NH3)2PbCl4和(n-FC6H4C2H4NH3)2PbCl4(n=2，3，4)晶体，并研究了晶体的光学和闪烁性能。从X-射线衍射图看，苯环上的F-取代使晶格常数大于(C6H5C2H4NH3)2PbCl4。由于限制在400-700 nm的无机层中的自陷激子的复合，它们显示出光致发光和闪烁峰。X射线照射2毫秒后，20毫秒的余辉水平为100-600毫秒。从241Amα射线(5.5MeV)辐照下的脉冲高度谱计算出(C6H5C2H4NH3)2PbCl4、(3-FC6H4C2H4NH3)2PbCl4和(4-FC6H4C2H4NH3)2PbCl4样品的光产额分别为1,400、1,800和1,700 ph/5.5 MeV-α。
(C6H5C2H4NH3)2PbCl4and (n-FC6H4C2H4NH3)2PbCl4(n = 2, 3, and 4) crystals were grown by the slow-cooling method, and the optical and scintillation properties were investigated. From the X-ray diffraction pattern, F-substitution in a benzene ring makes the lattice constant larger than (C6H5C2H4NH3)2PbCl4. They exhibited photoluminescence and scintillation peaks due to the recombination of the self-trapped excitons confined in inorganic layers at 400–700 nm. The afterglow levels at 20 ms after X-ray irradiation for 2 ms were 100–600 ppm. From the pulse height spectra under241Am α-ray (5.5 MeV) irradiation, the light yields of (C6H5C2H4NH3)2PbCl4, (3-FC6H4C2H4NH3)2PbCl4, and (4-FC6H4C2H4NH3)2PbCl4samples were calculated to be 1,400, 1,800, and 1,700 ph/5.5 MeV-α.