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实现长期稳定的MAPbBr₃单晶光导体,具有高开/关比和检测能力

Vishnu Anilkumar¹, Apurba Mahapatra¹, Joanna Kruszyńska¹

¹Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. dprochowicz@ichf.edu.pl.

Chemical communications (Cambridge, England)

|January 10, 2025

概括

我们使用硫酸被动化开发了一种稳定的矿光探测器. 这种增强的设备表现出更好的性能,并保持高检测能力和开/关比超过一年.

科学领域:

材料科学材料科学材料科学
光电学是指光电子产品.
半导体物理半导体物理

背景情况:

化 PeroVskite 光探测器提供高性能,但运行稳定性不佳.
表面缺陷和重组途径限制了基于矿的光电子设备的稳定性和性能.

研究的目的:

为了提高甲基化 (MAPbBr₃) 单晶光电探测器的稳定性和性能.
为了研究超薄硫酸盐 (PbSO₄) 被动化对光探测器特性的影响.

主要方法:

使用MAPbBr₃单晶的光探测器的制造.
用超薄的PbSO₄层对MAPbBr₃表面进行被动化.
在长时间运行测试之前和之后,对设备性能进行表征,包括检测能力和启/关比.

主要成果:

与控制装置相比,PbSO₄被动光探测器显示出更高的检测能力和开/关比.
被动化有效地减少了表面陷状态,并抑制了电荷载体重组.
被动化设备在一年后保留了大约56%的初始检测能力 (D*) 和801的启/关比,显著超过了控制设备 (~22%D*和~6的启/关比).

结论:

超薄PbSO₄被动化是提高MAPbBr₃单晶光探测器稳定性和性能的一种高度有效的策略.
性能改善归因于表面再组合减少和较低的暗电流.
这种方法为开发基于矿的强大而可靠的光电子设备提供了有前途的途径.

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