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稳定于空气的混合化酸矿膜和显微镜研究它们的降解过程

Anubha Agarwal¹, Shun Omagari¹, Martin Vacha¹

¹Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-S8-44, Meguro-ku, Tokyo 152-8552, Japan. vacha.m.aa@m.titech.ac.jp.

|June 14, 2023

概括

混合的酸矿膜 (MA_1-xFA_xPbI₃) 在用乙烯酸制备时显示出超过一年的显著稳定性. 降解形成二维矿板,但纳米级光物理仍然不受影响.

科学领域:

材料科学材料科学材料科学
光物理学的光学物理学
固态化学固态化学

背景情况:

混合阴离子矿,特别是MA_1-xFA_xPbI₃,是有前途的光伏材料.
了解它们的长期稳定性和降解途径对于设备应用至关重要.
纳米尺度表征技术对于在基本层面探测材料特性至关重要.

研究的目的:

为了研究混合化矿膜的组成稳定性和降解机制.
在老化过程中描述这些膜的纳米级光物理性质.
为了比较不同抗溶剂 (乙酸乙烯与) 对薄膜稳定性的影响.

主要方法:

通过一步旋转涂层制备MA_1-xFA_xPbI₃矿膜 (x = 0, 0.3, 0.5).
在现场光发光 (PL) 光谱仪用于监测降解.
纳米级PL光谱和PL闪分析,以研究光物理变化.
形态分析观察膜微观结构的变化.

主要成果:

用乙酸乙烯作为抗溶剂制备的薄膜在周围空气中表现出超过一年的组成稳定性.
降解开始于薄膜边缘,形成不同厚度的二维矿板.
老化导致谷物粗,但不会改变动态PL火或远程电荷扩散.

结论:

与二相比,乙烯酸乙烯是一种优越的抗溶剂,可以实现稳定的混合酸矿膜.
降解途径涉及二维矿结构的形成.
本质的纳米级光物理特性,包括电荷传输,在老化过程中保持稳健.

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