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老化CsPbBr₃纳米晶晶片用于超低离子迁移和环境稳定性,用于直接X射线检测

Fenghua Li^1,2,3, Hu Wang^1,2,3, Zhilong Chen^1,3,4

¹Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.

ACS applied materials & interfaces

|February 13, 2024

概括

我们开发了一种稳定,厚厚的矿纳米晶片,用于X射线检测. 这种材料克服了以前的稳定性问题,显示了高级X射线成像板的高灵敏度和长期性能.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
探测器物理学的物理

背景情况:

佩罗夫斯基特为X射线检测提供了出色的光电性能.
三维矿遭受离子迁移和不稳定.
纳米晶 (NC) 矿表现出更好的稳定性,但保留了接口缺陷.

研究的目的:

为X射线探测器开发一种稳定而厚厚的矿纳米晶 (NC) 材料.
为了应对基于NC的吸收层厚度和接口缺陷的挑战.
为了提高矿X射线探测器的操作稳定性和性能.

主要方法:

通过静态压缩制造厘米大小,毫米厚的CsPbBr₃NC晶圆.
在环境湿度老化过程中使用CsPb₂Br₅修复接口NC缺陷.
光电特性,稳定性和暗电流漂移的表征.

主要成果:

实现了200μC Gy_air-1 cm^{-2 的高灵敏度.}
证明了超低的暗电流漂移 (1.78 × 10-8 nA cm-1 s-1 V-1 @ 400 V cm-1).
在环境湿度下60天内,存储稳定性很好,降解程度微不足道.

结论:

老化矿NC晶片是下一代X射线成像板的一个有希望的策略.
开发的晶圆克服了传统矿X射线探测器的局限性.
这种方法可以使更厚,更稳定的吸收层用于增强的X射线检测.

关键词:

在CsPbBr3Br3中.一个X射线探测器.黑暗的电流漂移黑暗的电流漂移离子迁移离子迁移纳米晶体纳米晶体是什么佩洛夫斯基特 (Perovskite) 是一种矿物.

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