Enhanced (111) orientation resulted from hydrophobic protective layer for high efficiency and ambient stability of perovskite solar cells

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2024-12-13 DOI:10.1016/j.apsusc.2024.162083

Haimin Li, Bo An, Shuqian Liu, Guangzhao Zhang, Hongyang Chen, Jia Liao, Zheng Zhang, Yuhao Wei, Xingchong Liu, Hanyu Wang

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Abstract

Perovskite solar cells (PSCs) have aroused great attention due to its low cost and high efficiency. However, the moisture instability is one of the main obstacle for its industrialization. In this work, we coated Methyl Succinamate (MS) hydrophobic protective layer on top of perovskite (PVK) layer with electron transport layer (ETL) prepared by chemical bath deposition (CBD). The ester and amide groups act as hydrophobic groups to prevent the erosion from water vapor. In addition, –NH₂ and C=O can interact with uncoordinated Pb²⁺ to stabilize the octahedral structure in PVK. Eventually, XRD results demonstrate that (111) orientation degree is greatly promoted from 0.09 to 0.25. In the end, the efficiency of the device prepared in the glove box increased by 0.76 %, from 21.99 % to 22.75 %. While, the maximum efficiency of the devices prepared in ambient was improved by 1.46 %, from 19.43 to 20.89 %, almost twice promotion of the devices prepared in N₂ atmosphere. This work manifest that enhanced (111) orientation is favorable for ambient preparation of PSCs.

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疏水保护层增强了钙钛矿太阳能电池的（111）取向，提高了电池的效率和环境稳定性

钙钛矿太阳能电池（PSCs）因其低成本、高效率而备受关注。然而，水分不稳定性是其产业化的主要障碍之一。本研究在钙钛矿（PVK）层上包覆琥珀酸甲酯（MS）疏水保护层，并用化学浴沉积（CBD）法制备电子传输层（ETL）。酯和酰胺基团作为疏水性基团，以防止水蒸气的侵蚀。此外，-NH2和C=O可以与不配位Pb2+相互作用，稳定PVK中的八面体结构。XRD结果表明，（111）的取向度由0.09提高到0.25。最后，在手套箱中制备的器件效率提高了0.76 %，从21.99 %提高到22.75 %。而在普通气氛下制备的器件的最大效率提高了1.46 %，从19.43提高到20.89 %，几乎是在N2气氛下制备的器件的两倍。这项工作表明，增强的（111）取向有利于PSCs的环境制备。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.