Scalable Fabrication of Methylammonium-Free Wide-Bandgap Perovskite Solar Cells by Blade Coating in Ambient Air.

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-07-01 DOI:10.1007/s40820-025-01838-6

Jianbo Liu,Meng Zhang,Xiaoran Sun,Linhu Xiang,Xiangyu Yang,Xin Hu,Zhicheng Wang,Tian Hou,Jinzhao Qin,Yuelong Huang,Mojtaba Abdi-Jalebi,Xiaojing Hao

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Abstract

Scalable fabrication of efficient wide-bandgap (WBG) perovskite solar cells (PSCs) is crucial to realize the full commercial potential of tandem solar cells. However, there are challenges in fabricating efficient methylammonium-free (MA-free) WBG PSCs by blade coating, especially its phase separation and films stability. In this work, an MA-free WBG perovskite ink is developed for preparing FA0.8Cs0.2Pb(I0.75Br0.25)3 films by blade coating in ambient air. Among various A-site iodides, RbI is found to be the most effective in suppressing the precipitation of PbI2 induced by Pb(SCN)2 while keeping the enlarged grains. The distribution of Rb suggested that the Rb ions are kept isolated with the perovskite grains during the crystallization and Ostwald ripening processes, which contributes to the formation of the large-grain WBG perovskite film with minimum non-radiative recombination. As a result, a power conversion efficiency (PCE) of 23.0% was achieved on small-area WBG PSCs, while mini-modules with an aperture area of 10.5 cm2 exhibited a PCE of 20.2%, among the highest reported for solar cells prepared with WBG perovskites via blade coating. This work presents a scalable and reproducible fabrication strategy for stable MA-free WBG PSCs under ambient conditions, advancing their path toward commercialization.

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无甲铵宽禁带钙钛矿太阳能电池的叶片涂层可扩展制备。

高效宽带隙钙钛矿太阳能电池（PSCs）的可扩展制造是实现串联太阳能电池全部商业潜力的关键。然而，利用叶片涂层技术制备高效的无甲基铵（MA-free） WBG PSCs存在诸多挑战，特别是其相分离性和膜稳定性。本文研制了一种不含ma的WBG钙钛矿油墨，用于在环境空气中进行叶片涂布制备FA0.8Cs0.2Pb(I0.75Br0.25)3薄膜。在各种a位碘化物中，RbI对Pb(SCN)2诱导的PbI2析出抑制效果最好，同时保持了晶粒的扩大。Rb的分布表明，在结晶和奥斯特瓦尔德成熟过程中，Rb离子与钙钛矿颗粒保持隔离，这有助于以最小的非辐射复合形成大颗粒WBG钙钛矿膜。结果，在小面积WBG PSCs上实现了23.0%的功率转换效率（PCE），而孔径面积为10.5 cm2的微型组件的PCE为20.2%，是通过叶片涂层由WBG钙钛矿制备的太阳能电池中最高的。这项工作提出了一种在环境条件下稳定的无ma WBG psc的可扩展和可重复的制造策略，推进了其商业化的道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.