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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (7): 1289-1296.DOI: 10.16553/j.cnki.issn1000-985x.2025.0077

• 研究论文 • 上一篇    下一篇

英寸级(C24H20P)2MnBr4单晶薄膜生长及高分辨率X射线成像

杨帆(), 张思媛, 董武佩, 王希正, 周铭, 居佃兴()   

  1. 青岛科技大学材料科学与工程学院,青岛 266042
  • 收稿日期:2025-04-13 出版日期:2025-07-20 发布日期:2025-07-30
  • 通信作者: 居佃兴,博士,副教授。E-mail:jdx@qust.edu.cn
  • 作者简介:杨 帆(2001—),男,山东省人,硕士研究生。E-mail:18806420336@163.com
    居佃兴,青岛科技大学副教授,博士毕业于山东大学晶体材料国家重点实验室。主要研究方向为新型有机金属卤化物单晶材料的设计、生长、光电性质及X射线成像等辐射探测领域。主持国家自然科学基金青年项目、山东省自然科学基金青年项目、山东省青创团队项目等多项。以第一作者或共同作者在Angewandte Chemie International EditionACS Energy LettersAdvanced Functional Materials Nano EnergyChemical Engineering Journal等国际学术刊物上发表SCI论文30余篇。
  • 基金资助:
    国家自然科学基金青年项目(62104124)

Growth and High Resolution X-Ray Imaging of Inch-Size (C24H20P)2MnBr4 Single Crystalline Film

YANG Fan(), ZHANG Siyuan, DONG Wupei, WANG Xizheng, ZHOU Ming, JU Dianxing()   

  1. College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China
  • Received:2025-04-13 Online:2025-07-20 Published:2025-07-30

摘要: 有机金属卤化物在X射线成像领域展现出巨大的应用潜力。然而,多晶薄膜闪烁体屏幕的均匀性差、透射率低和光散射等问题严重降低了X射线成像分辨率。本文使用空间限域法生长制备了英寸级(C24H20P)2MnBr4单晶薄膜,并对其进行了物相、光学和闪烁性能的研究。该晶体表现出90%的光致发光量子产率(PLQY)及优异的光稳定性,在365 nm紫外光下连续照射24 h,其光谱仍保持稳定。基于该晶体优异的光学性质,在X射线下产生83 000 photons/MeV(估算值)的高光产额,是商用LYSO闪烁体的2.5倍。此外,该晶体展现出优异的耐辐射稳定性,即使在504 mGy·s-1的高剂量率下暴露60 min后仍保持其性能的稳定性。基于上述优势,将(C24H20P)2MnBr4单晶薄膜应用于X射线成像,实现了约23 lp/mm的空间分辨率,在该领域展现出巨大的应用潜力。

关键词: (C24H20P)2MnBr4; 有机金属卤化物; 空间限域; 单晶薄膜; 闪烁性能; X射线成像

Abstract: Organometallic halides have shown great potential in X-ray imaging. However, problems such as poor uniformity, low transmittance and light scattering of polycrystalline thin film scintillator screens seriously reduce the X-ray imaging resolution. In this paper, inch-size (C24H20P)2MnBr4 single crystalline film was prepared by the space confinement method, and the phase, optical and scintillation properties were studied. This crystal exhibits a photoluminescence quantum yield (PLQY) of 90% and excellent photostability. After continuous irradiation of the crystal with 365 nm ultraviolet light for 24 h, its spectrum remains stable. Based on the excellent optical properties of this crystal, a high light yield of 83 000 photons/MeV (estimated value) is generated under X-rays, which is 2.5 times higher than that of commercial LYSO scintillator. In addition, this crystal exhibits excellent radiation stability and maintains its performance stability even after being exposed to a high dose rate of 504 mGy·s-1 for 60 min. Based on the above advantages, the (C24H20P)2MnBr4 single crystalline film is applied into X-ray imaging, achieving a spatial resolution of approximately 23 lp/mm, demonstrating great application potential in this field.

Key words: (C24H20P)2MnBr4; organometallic halide; space confinement; single crystalline film; scintillation property; X-ray imaging

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