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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (7): 1256-1264.DOI: 10.16553/j.cnki.issn1000-985x.2025.0018

• 研究论文 • 上一篇    下一篇

BA2MA3Pb4I13相纯度调控及其对X射线探测的影响

张爱平1,2(), 魏亚洲2, 周昌垚2, 袁瑞涵2,3, 吴聪聪1(), 郑霄家2,3()   

  1. 1.湖北大学新能源与电气工程学院,武汉 430062
    2.中国工程物理研究院化工材料研究所,绵阳 621900
    3.四川新材料研究中心,成都 610200
  • 收稿日期:2025-01-23 出版日期:2025-07-20 发布日期:2025-07-30
  • 通信作者: 吴聪聪,博士,教授。E-mail:ccwu@hubu.edu.cn;郑霄家,博士,研究员。E-mail:xiaojia@caep.cn
  • 作者简介:张爱平(1998—),男,湖北省人,硕士研究生。E-mail:zhangaiping@stu.hubu.edu.cn
    吴聪聪,湖北大学材料科学与工程学院教授,湖北省“百人计划”创新人才。2007年、2014年分别获得华中科技大学材料科学与工程学士、博士学位。2014—2018年在美国弗吉尼亚理工大学能源收集材料研究中心(CEHMS)任博士后和研究助理。2018—2019年在美国宾夕法尼亚州立大学材料科学与工程学院担任研究副教授、能源与环境研究中心光伏实验室负责人。主要从事新型光伏材料和器件、二维有机-无机复合材料、柔性电子器件、仿生材料与器件等方面研究。在Science Advances、Nano Letter、Joule、ACS Energy Lett等国际知名期刊上发表论文50余篇,主持编纂英文专著Energy Harvesting: Materials, Physics, and System Design with Practical Examples 1部。
    郑霄家,研究员、博士生导师,四川省高层次人才计划青年拔尖人才,四川省科技创新人才,四川省海外高层次留学人才,中国工程物理研究院化工材料研究所新材料中心军民两用材料与器件课题组负责人,上海交通大学、电子科技大学、四川大学、北京工业大学等高校兼职研究生导师。在Light Sci ApplDeviceAdv Mater等刊物上发表SCI论文60余篇,申请发明专利6项。曾荣获欧美同学会创新创业大赛先进材料产业赛区一等奖&全国三等奖、首届中国材料技术与应用大会优秀组织奖、J Energy Chem期刊最佳审稿人等荣誉。
  • 基金资助:
    四川省科技创新人才(2022JDRC0021)

Phase Purity Regulation of BA2MA3Pb4I13 and Its Influence on X-Ray Detection

ZHANG Aiping1,2(), WEI Yazhou2, ZHOU Changyao2, YUAN Ruihan2,3, WU Congcong1(), ZHENG Xiaojia2,3()   

  1. 1.School of New Energy and Electrical Engineering,Hubei University,Wuhan 430062,China
    2.Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621900,China
    3.Sichuan New Materials Research Center,Chengdu 610200,China
  • Received:2025-01-23 Online:2025-07-20 Published:2025-07-30

摘要: 二维Ruddlesden-Popper(RP)层状钙钛矿因优异的光电性能和良好的环境稳定性,近年来已成为太阳能电池、发光二极管及X射线探测等领域的研究热点。然而,采用溶液法制备的二维RP型层状钙钛矿通常并非单一无机层数的纯相钙钛矿,而是呈现出具有随机无机层数(即多个n值)的混合相,这一特性显著影响了该材料在各个领域的进一步应用与发展。本研究通过使用BAAc替代BAI来调控二维RP层状钙钛矿的结晶过程,实现了有效的相纯化,证实了该方法在提升材料相纯度方面的效果。相纯化后的钙钛矿材料展现了更加均匀的相分布,减少了缺陷的形成,进而显著改善了载流子的提取与传输能力,抑制了离子迁移。这些结构上的改善直接推动了X射线探测器性能的提升。相纯化的探测器表现出比未纯化器件更低的检测下限(160.24 nGyair·s-1),在低剂量X射线探测方面展现了更强的能力。此外,经过长时间的X射线辐照后,相纯化器件的信号电流衰减幅度远小于未纯化器件,表明其具有更好的辐照稳定性。因此,相纯化不仅有效提升了二维钙钛矿X射线探测器的探测性能,还增强了器件的稳定性,证明了相纯化技术在钙钛矿X射线探测器中的广泛应用前景。

关键词: 调控结晶; 二维钙钛矿; BAAc; 相纯化; 抑制离子迁移; X射线探测器

Abstract: Two-dimensional Ruddlesden-Popper (RP) layered perovskites have received lots of attention in recent years due to their excellent optoelectronic properties and good environmental stability. Their unique properties make them ideal candidates for applications in solar cells, light-emitting diodes, and X-ray detectors. However, two-dimensional RP-type layered perovskites synthesized by solution methods typically exhibit mixed phases with random inorganic layer numbers (i.e., multiple n-values), which hinders their application. In this study, the crystallization process of RP layered perovskites was regulated by replacing BAI with BAAc to achieve effective phase purification. The enhancement in phase purity was confirmed by characterization methods, and the phase-purified perovskite material exhibits reduced defects. Consequently, significantly improved carrier extraction and transport capabilities, along with suppressed ion migration were achieved. These structural improvements directly enhanced the performance of the X-ray detectors. The phase-purified detectors exhibit lower detection limits (160.24 nGyair·s-1) compared to the unpurified devices, demonstrating stronger capability in low-dose X-ray detection. Additionally, the phase-purified device shows good irradiation stability. Therefore, phase purification not only effectively improved the detection performance of two-dimensional perovskite X-ray detectors but also enhanced device stability, proving the broad application prospects of phase-purification technology in perovskite X-ray detectors.

Key words: regulated crystallization; two-dimensional perovskite; BAAc; phase purification; inhibition of ion migration; X-ray detector

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