Morphology Optimization of Perovskite Films for Efficient Cells and Modules through Solvent Engineering

IF 6 3区工程技术 Q2 ENERGY & FUELS

Solar RRL Pub Date : 2024-10-10 DOI:10.1002/solr.202400594

Xinzhu Li, Yibo Xu, Chenguang Zhou, Yue Li, Jianning Ding, Lvzhou Li, Ningyi Yuan

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Abstract

N-Methyl-2-pyrrolidone (NMP) has become one of the mainstream Lewis base ligand solvents for the fabrication of high-quality FA-based perovskite films. However, the NMP-based perovskite films with small grain sizes always own a mirror surface which will increase the reflection of light and limit the current of perovskite solar cells (PSCs). In this work, 2-pyrrolidone (NP) with a higher boiling point and stronger binding to precursor components is introduced into the precursor solution to improve the crystallization and morphology of perovskite. Finally, a rougher perovskite film with a larger grain size can be fabricated via an optimized NP and NMP mixed ligand solvent. Based on this strategy, the champion device achieved a power conversion efficiency (PCE) of 24.20% (certified PCE of 23.81%) and 22.13% on an aperture area of 0.0875 and 22.96 cm², respectively. In addition, the introduction of NP enhances the humidity and light stability of the film, and the device retained 94.1% of its initial efficiency after 120 h.

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高效电池和组件用钙钛矿膜的溶剂工程形态学优化

n -甲基-2-吡咯烷酮（NMP）已成为制备高质量fa基钙钛矿薄膜的主流路易斯碱配体溶剂之一。然而，小颗粒纳米颗粒的钙钛矿薄膜总是具有镜面，这将增加光的反射并限制钙钛矿太阳能电池（PSCs）的电流。本研究将沸点较高、与前驱体组分结合较强的2-吡咯烷酮（NP）引入前驱体溶液中，改善钙钛矿的结晶和形貌。最后，通过优化的NP和NMP混合配体溶剂，可以制备出粒径更大、更粗糙的钙钛矿膜。基于该策略，冠军器件在孔径面积为0.0875 cm2和22.96 cm2的情况下，功率转换效率（PCE）分别达到24.20%（认证PCE为23.81%）和22.13%。此外，NP的引入增强了薄膜的湿度和光稳定性，器件在120 h后保持了94.1%的初始效率。

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来源期刊

Solar RRL Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

12.10

自引率

6.30%

发文量

460

期刊介绍： Solar RRL, formerly known as Rapid Research Letters, has evolved to embrace a broader and more encompassing format. We publish Research Articles and Reviews covering all facets of solar energy conversion. This includes, but is not limited to, photovoltaics and solar cells (both established and emerging systems), as well as the development, characterization, and optimization of materials and devices. Additionally, we cover topics such as photovoltaic modules and systems, their installation and deployment, photocatalysis, solar fuels, photothermal and photoelectrochemical solar energy conversion, energy distribution, grid issues, and other relevant aspects. Join us in exploring the latest advancements in solar energy conversion research.