钙钛矿型闪烁晶体的研究进展

摘要/Abstract

摘要： 闪烁晶体材料一般可用于X射线、γ射线、中子及其他高能粒子的探测。经过100多年的发展,以闪烁晶体为核心的探测和成像技术已经在核医学、高能物理、安全检查、工业无损探伤、空间物理及核探矿等方面得到了广泛的应用。随着人们对闪烁晶体材料进一步深入的研究和科技的发展,现今市面上较好的LaBr₃∶Ce等卤化物闪烁晶体由于生产成本过高、各向异性及脆性等缺点逐渐不能满足发展的需要,而钙钛矿型闪烁晶体材料由于其容易被改善的潮解性、低的生产成本、易于调整的生长条件以及良好的闪烁性能,逐步进入人们的视野。本文从晶体结构、性能、生长方法、发展趋势和应用前景等方面,着重介绍了ABX₃(A⁺为Cs⁺,B²⁺为部分碱土金属离子,X^-为非氟卤族元素离子)钙钛矿型闪烁晶体材料和K基钙钛矿结构闪烁晶体材料。最终,通过掺杂部分稀土元素和改善生长工艺等方法,即可得到光输出高、能量分辨率好,且成本较低、可广泛应用于市场的钙钛矿型闪烁晶体。

关键词: 闪烁晶体, 钙钛矿, 光输出, 能量分辨率, 潮解性, 生长方法

Abstract: Scintillation crystal materials can be used in the detection of X-rays, γ-rays, neutrons and other high energy particles. After more than 100 years of development, the detection and imaging technology which take scintillating crystals as the core have been widely used in nuclear medicine, high energy physics, safety inspection, industrial nondestructive inspection, space physics and nuclear prospecting. With the further research and development of scintillation crystal materials, the better halide scintillation crystals such as LaBr₃:Ce on the market are gradually unable to meet the needs of development due to their high production cost, anisotropy and brittleness. At the same time, perovskite-type scintillation crystal materials have gradually entered people's vision because of their easily improved deliquescence, lower production cost, easily adjusted growing conditions and good scintillation performance. In this paper, the crystal structure, property, growth method, development trend and application prospect of perovskite-type scintillation crystal materials ABX₃ (A⁺ is Cs⁺, B²⁺ is part alkali-earth metal ions, X^- is non-fluorine halogen ions) and K-based perovskite scintillation crystal materials are introduced emphatively. By doping some rare earth elements and improving the growth process, perovskite-type scintillation crystals with high light yield, good energy resolution and low cost can be widely used in the market.

Key words: scintillation crystal, perovskite, light yield, energy resolution, deliquescence, growth method

中图分类号:

O734
O782

朱梦淇, 温航, 王彪, 王庆波, 李静, 王继扬. 钙钛矿型闪烁晶体的研究进展[J]. 人工晶体学报, 2021, 50(10): 1844-1857.

ZHU Mengqi, WEN Hang, WANG Biao, WANG Qingbo, LI Jing, WANG Jiyang. Research Progress of Perovskite-Type Scintillation Crystals[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(10): 1844-1857.

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