Synergistic Passivation of Pyridinium Tetrafluoroborate (PyBF4) in Inverted (CsPbI3)0.05((FAPbI3)1−x(MAPbBr3)x)0.95 Solar Cells with Atomic Layer Deposited NiO Layers

IF 6 3区 工程技术 Q2 ENERGY & FUELS
Solar RRL Pub Date : 2024-12-12 DOI:10.1002/solr.202400765
Yinyan Xu, Hyoungmin Park, Urasawadee Amornkitbamrung, Hyeon Jun Jeong, Canjie Wang, Yongjae In, Aedan Gibson, Hyunjung Shin
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引用次数: 0

Abstract

Nickel oxide (NiO) is a promising hole transport layer (HTL) that can be used to fabricate efficient, large-scale inverted-type perovskite solar cells (PSCs). However, depositing a high-quality perovskite layer on NiO substrates comparable to those realized in the normal structure still presents a challenge. Herein, a pyridinium tetrafluoroborate (PyBF4) additive is introduced to passivate the intrinsic defects in the bulk perovskite films. The nitrogen Lewis base in the PyBF4 molecule interacts well with uncoordinated Pb2+ cations, leading to high-quality perovskite films with minimized defects. Meanwhile, the pseudohalide BF4 can fill halogen vacancies in the perovskite films to enable defect passivation. As a result, the perovskite precursor solution with PyBF4 shows better reproducibility for high-efficiency devices. The optimal PSC based on PyBF4 modification yields a champion power conversion efficiency of 22.7% with atomic layer deposited NiO as the HTL.

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来源期刊
Solar RRL
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.
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