控制厚度的空间限制增长 Cs3Bi2I9 矿单晶晶片用于X射线探测器
Manman Yang1, Xiaoling Wu1, Anfeng Li1
1College of Materials Science and Engineering & Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, 610064, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|June 12, 2024
概括
一种新的空间有限的方法使二甲 (Cs3Bi2I9) 单晶直接生长,用于X射线检测. 最佳厚度为0.7毫米,可提高设备的灵敏度,提供稳定,无替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 在X射线检测技术.
背景情况:
- 完全无机的无矿如Cs3Bi2I9提供了增强的稳定性和环保性.
- 单晶Cs3Bi2I9在X射线检测中表现出优越的光电性能,与多晶形式相比,由于没有颗粒边界,因此具有优越的光电性能.
- 射线探测器的性能受到X射线吸收层厚度的显著影响.
研究的目的:
- 开发一种方法来制备厚度控制的矿单晶晶片 (PSCW).
- 研究单晶厚度对X射线探测器性能的影响.
- 为了在X射线检测应用中确定Cs3Bi2I9单晶的最佳厚度.
主要方法:
- 用有限元模拟来确定用于设计局限空间增长方法的温度场.
- 使用一个空间有限的方法,直接生长Cs3Bi2I9单晶,控制厚度.
- 使用准备好的PSCW制造了X射线探测器,并在不同的厚度下评估了它们的性能.
主要成果:
- 一系列厚度控制的Cs3Bi2I9单晶晶片成功地使用空间有限的方法制备.
- X射线探测器的灵敏度最初随着单晶厚度的增加而增加,随后下降.
- 在0.7毫米厚度和40V毫米-1.1的电场下,获得了11313.6μC Gy-1cm-2的最佳设备灵敏度.
结论:
- 这种空间有限的方法允许直接生长高质量,厚度规定的矿单晶,绕过传统的切片或蚀刻工艺.
- 优化Cs3Bi2I9单晶的厚度对于最大限度地提高X射线探测器性能至关重要.
- 这种方法为开发稳定且环保的无矿X射线探测器提供了可行的途径.
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