CsPbBr3单晶薄膜制备及其X射线探测性能研究

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (10): 1900-1906.

CsPbBr₃单晶薄膜制备及其X射线探测性能研究

张欣雷¹, 王涛^1,2, 查钢强^1,2

1.西北工业大学,辐射探测材料与器件工信部重点实验室,西安 710072;
2.西北工业大学深圳研究院,深圳 518063

收稿日期:2021-08-26 出版日期:2021-10-15 发布日期:2021-11-24
通讯作者: 查钢强,博士,教授。E-mail:zha_gq@nwpu.edu.cn
作者简介:张欣雷(1989—),男,陕西省人,博士研究生。E-mail:xinlei_zhang@mail.nwpu.edu.cn。查钢强(1980—),男,博士,西北工业大学材料学院教授、博士生导师、教育部新世纪优秀人才、国家万人计划青年拔尖人才。主要研究方向为新型碲锌镉高能射线探测器的研制及应用开发,在低成本碲锌镉材料制备、晶体加工处理与质量评价、缺陷调控与性能表征、器件设计与制备等方面开展了一系列的研究。主持国家自然科学基金、工信部民机科研项目、装发军用电子元器件项目等10余项科研项目,发表学术论文100余篇,申请国家发明专利20余项。
基金资助:
国家自然科学基金面上项目(61874089);山东省科技创新重大专项(2019JZZY021001)

Fabrication of CsPbBr₃ Single-Crystal Film and Its X-Ray Detection Performance

ZHANG Xinlei¹, WANG Tao^1,2, ZHA Gangqiang^1,2

1. Key Laboratory of Radiation Detection Materials and Devices, Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an 710072, China;
2. Shenzhen Research Institute of Northwestern Polytechnical University, Shenzhen 518063, China

Received:2021-08-26 Online:2021-10-15 Published:2021-11-24

摘要/Abstract

摘要： X射线探测在医疗、工业无损检测、国土安全等领域具有重要意义。制备高灵敏度的X射线探测器可以降低X射线剂量,在医疗和安检中至关重要。本文系统研究了采用空间限域法制备的高质量CsPbBr₃单晶薄膜,并用该薄膜制备出了性能良好的X射线探测器。借助偏光显微镜、扫描电子显微镜及其配备的能谱系统和背散射电子衍射系统对薄膜的形貌、厚度、成分和取向进行了分析。研究发现所制备的单晶薄膜表面平整、光滑,元素分布均匀,晶体取向均一。利用该薄膜制备的探测器具有较高电阻率(约7.23×10⁸ W·cm)和极高的灵敏度(约2 610 μC·Gy^-1·cm^-2)。

关键词: CsPbBr₃, 钙钛矿, 单晶薄膜, X射线探测, 高灵敏度, 空间限域法

Abstract: X-ray detection is of great significance for medical diagnostics, security inspection, and homeland security. The fabrication of a high-sensitivity X-ray detector can reduce the X-ray dose, especially in medical and security inspections. In this paper, the high-quality CsPbBr₃ single-crystal film was prepared by a space-confined method. Then an X-ray detector with good performance based on the film were fabricated. The morphology, thickness, composition, and orientation of the films were analyzed by the polarizing microscope, scanning electron microscope equipped with EDS, and EBSD detector. It is found that the prepared single-crystal films have a flat, smooth surface, uniform element distribution, and homogeneous crystal orientation. The detector has high resistivity of 7.23×10⁸ W·cm and an extremely high sensitivity of 2 610 μC·Gy^-1·cm^-2.

Key words: CsPbBr₃, perovskite, single-crystal film, X-ray detection, high-sensitivity, space confined method

中图分类号:

O782
O484

张欣雷, 王涛, 查钢强. CsPbBr₃单晶薄膜制备及其X射线探测性能研究[J]. 人工晶体学报, 2021, 50(10): 1900-1906.

ZHANG Xinlei, WANG Tao, ZHA Gangqiang. Fabrication of CsPbBr₃ Single-Crystal Film and Its X-Ray Detection Performance[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(10): 1900-1906.

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CsPbBr₃单晶薄膜制备及其X射线探测性能研究

Fabrication of CsPbBr₃ Single-Crystal Film and Its X-Ray Detection Performance

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