有效和稳定的β-CsPbII

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Yifan Lv¹, Yiqun Li¹, Yan Zhou¹

¹Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University (NanjingTech), Nanjing, Jiangsu 211816, P.R. China.

ACS applied materials & interfaces

|June 8, 2023

概括

化 (CsPbI3) 矿薄膜在光活性阶段使用MAAc溶剂稳定. 这种方法提高了矿太阳能电池的效率和稳定性,这对于光伏应用至关重要.

科学领域:

材料科学材料科学材料科学
太阳能光伏发电是如何实现的
固态化学固态化学

背景情况:

化 (CsPbI3) 是太阳能电池的一个有前途的矿材料,因为它的带隙和热稳定性.
CsPbI3容易从其光活性到光无活性状态的相位过渡,特别是在潮湿的条件下,限制了设备的性能.
对于高效,稳定的矿太阳能电池 (PSC) 来说,在所需的β-晶相和紧形态中,CsPbI3薄膜的可控生长至关重要.

研究的目的:

开发一种可控增长β-CsPbI3矿薄膜的方法.
提高CsPbI3的相稳定性和形态,以提高PSC的性能.
调查溶剂和协调在稳定CsPbI3.3光活性相中的作用.

主要方法:

使用MAAc (N-甲基胺) 作为CsPbI3前体溶液的溶剂.
在溶液加工过程中研究了中间化合物 (CsxMA1-xPbIxAc3-x) 的形成.
分析了化对离子交换和相位转换的影响.
研究了CO···Pb协调在稳定β-CsPbI3阶段中的作用.

主要成果:

使用MAAc溶剂制造的β-CsPbI3矿薄膜,导致可控制的生长.
观察到在化过程中形成中间化合物和随后的离子交换.
证明了CO···Pb协调稳定了黑相β-CsPbI3.
实现了PSC,功率转换效率为18.9%.
显示了设备稳定性的提高,在N2中2000小时后的效率衰减<10%,在未封装的潮湿空气中500小时后的衰减<30%.

结论:

MAAc溶剂有助于形成稳定的β-CsPbI3矿薄膜.
强大的CO··Pb协调是稳定光活性阶段和促进所需晶体生长的关键.
开发的方法显著提高了基于CsPbI3的PSC的效率和稳定性,为实际应用铺平了道路.

关键词:

离子液体是一种离子液体.矿太阳能电池是如何使用的溶剂工程溶剂工程 β-CsPbI3 的情况.

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