放射发光
卤化物
闪烁
闪烁体
量子产额
产量(工程)
发光
光致发光
铽
材料科学
化学
无机化学
光电子学
分析化学(期刊)
光学
物理
荧光
探测器
有机化学
冶金
作者
Qingquan He,Chenkun Zhou,Liang‐Jin Xu,Sujin Lee,Xinsong Lin,Jennifer Neu,Michael Worku,Maya Chaaban,Biwu Ma
出处
期刊:ACS materials letters
[American Chemical Society]
日期:2020-05-01
卷期号:2 (6): 633-638
被引量:179
标识
DOI:10.1021/acsmaterialslett.0c00133
摘要
Scintillators are utilized for X-ray detection in many important fields ranging from homeland security to health care. Developing low-cost, high-performance scintillation materials to address the issues of existing commercially available ones is of great interest. Recently, organic metal halide hybrids have emerged as highly promising luminescent materials with excellent optical properties and low-temperature solution processability. Herein, we report a zero-dimensional organic metal halide hybrid, (PPN)2SbCl5 (PPN = bis(triphenylphosphoranylidene)ammonium cation), as an X-ray scintillation material with high light yield and exceptional environmental stability. Our study shows that (PPN)2SbCl5 single crystals prepared by solution growth exhibit visible photoluminescence with a quantum efficiency of 98.1%. When excited by X-rays, (PPN)2SbCl5 single crystals exhibit radioluminescence with a near-perfect linearity over a large range of X-ray dose rates and a light yield of ∼49000 ph MeV–1, which is comparable to that of a commercial CsI(Tl) scintillator (∼54000 ph MeV–1). Moreover, the detection limit of (PPN)2SbCl5 (191.4 nGyair s–1) is much lower than the required value for regular medical diagnostics (5.5 μGyair s–1). (PPN)2SbCl5 single crystals also display remarkable stability, with little-to-no change in properties after storage under ambient conditions for 2 years.
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