Growth and Scintillation Properties of Na+-Doped CsCu2I3 Single Crystals
Growth and Scintillation Properties of Na+-Doped CsCu2I3 Single Crystals
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DOI：
10.3390/cryst13081157
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发表时间：
2023-07
期刊：
影响因子：
2.7
通讯作者：
Chang Shu;Qinhua Wei;Dongdong Liu;Wen Li;Hang Yin;Huanying Li;Gao Tang;L. Qin
中科院分区：
文献类型：
--
作者：
Chang Shu;Qinhua Wei;Dongdong Liu;Wen Li;Hang Yin;Huanying Li;Gao Tang;L. Qin
CsCu_2I_3晶体是一种很有前途的铜基卤化物闪烁探测材料。采用垂直布里奇曼法生长了尺寸为12 mm × 50 mm的掺Na+ CsCu2I3晶体，并对其性能进行了系统的研究。CsCu_2I_3：Na晶体具有峰值为575 nm的黄光发射和1.55 eV的大Stokes位移。根据XRD和XPS的结果，成功地引入了Na+。吸收光谱表明，Na+掺杂使CsCu_2I_3晶体的禁带宽度变窄。光致发光量子效率（PLQY）从16.4%提高到19.6%。最后，测量和讨论了137Cs源下的X射线诱导余辉和闪烁（能量分辨率，光产额和衰减时间）。这些结果表明，CsCu2 I3：Na晶体在辐射探测领域具有潜在的应用。
CsCu2I3 crystal is a promising Cu-based halide material for scintillation detection. In this paper, Na+ ion-doped CsCu2I3 crystals with a size of ϕ12 mm × 50 mm were grown successfully using the vertical Bridgman method, and the properties were systematically investigated. CsCu2I3:Na crystals exhibit yellow light emission peaking at 575 nm and a large Stokes shift of 1.55 eV. Based on the results of the XRD and XPS, the Na+ was introduced successfully. The optical absorption spectra show that the band gap of CsCu2I3 crystals was narrowed when the Na+ was doped. The photoluminescence quantum efficiency (PLQY) is improved from 16.4% to 19.6%. Finally, the X-ray-induced afterglow, and scintillation (energy resolution, light yield and decay time) under a 137Cs source were measured and discussed. These results illustrate that CsCu2I3:Na crystals have potential applications in the radiation detection field.