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2D Cs₂ Pb(SCN)₂ Br₂ X-Site 替代的矿用于X射线检测

Dan Liu¹, Haipeng Di¹, Jiwei Ren¹

¹Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China.

Small (Weinheim an der Bergstrasse, Germany)

|September 2, 2023

概括

新的X位点替代的二维拉德尔斯登-波珀矿,Cs2Pb (SCN) 2Br2,在X射线检测方面表现出卓越的稳定性和高性能,为先进的成像应用提供了有前途的替代方案.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
探测器技术探测器技术

背景情况:

2D Ruddlesden-Popper (RP) 矿以其稳定性和光电性质而闻名.
对二维RP矿的研究主要集中在A位置换上,对X位置换的探索有限,特别是用于X射线检测.

研究的目的:

为了研究X位置换的2D RP矿Cs2Pb(SCN) 2Br2多晶晶片用于X射线检测.
评估这些新矿探测器的光电性质和性能指标.

主要方法:

制备Cs2Pb ((SCN) 2Br2多晶晶片的方法.
系统地研究它们的电阻,离子激活能量,电流漂移和电荷载体移动性-寿命产品.
对X射线检测性能的描述,包括灵敏度,检测极限和空间分辨率.
在持续的X射线照射和高电场下评估运行稳定性.

主要成果:

Cs2Pb(SCN) 2Br2晶片表现出高电阻率 (2.0 × 10^10 Ω cm) 和离子激活能量 (0.75 eV).
在X射线下实现了高电荷载体运动寿命产品 (1.29 × 10^-4 cm^2 V^-1).
证明了出色的X射线检测灵敏度 (216.3μC Gy_air^-1 cm^-2) 和低的检测极限 (42.4 nGy_air s^-1).
展示了高空间分辨率 (1.08 lp mm^-1) 和在45.2 Gy_air辐射后,高达2100 V cm^-1的卓越操作稳定性.

结论:

在X位置换的Cs2Pb ((SCN) 2Br2 2D RP矿非常适合用于X射线检测应用.
短的八面体间距和弱离子迁移有助于它们的卓越性能和稳定性.
这项工作为基于SCN的2D矿在先进的X射线检测技术中开辟了新的途径.

关键词:

Cs2Pb(SCN) 2Br2晶圆片中的一个.检测X射线检测的X射线检测在X位点被替代的矿.高稳定性高稳定性低检测度的极限值.

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