Simultaneous trifunctional group passivation using imidazole derivatives for enhanced performance of perovskite solar cells

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub Date : 2025-04-06 DOI:10.1016/j.synthmet.2025.117872

Jun Yang , Qiaoli Niu , Yuqing Chen , Baoxiang Chai , Junhao Xiong , Wenjin Zeng , Xinwen Peng , Emmanuel Iwuoha , Ruidong Xia

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引用次数: 0

Abstract

Perovskite solar cells (PSCs) are one of the most promising energy technologies in the field of renewable energy. The solution-based perovskite film-forming method is one of its important advantages in commercialization. However, the polycrystalline perovskite thin films prepared by this method may also exhibit various defects, leading to a decrease in device performance. In this work, an imidazole derivative 1-(2-hydroxyethyl)-3-methylimidazolium chloride (HMCl) was used as a passivator for perovskite thin films. The imidazole moiety and hydroxyl in HMCl passivated the negatively charged I^- and positively Pb²⁺ defects in CH₃NH₃PbI₃ (MAPbI₃), respectively. Meanwhile the chloride ion establishes ionic bonds with uncoordinated Pb²⁺, further enhancing the passivation of defects. With HMCl, the PCE of the PSC was enhanced from 17.53 % of the control device to 19.71 %. In addition, the introduction of HMCl enhanced the hydrophobicity of perovskite films, and therefore, improved the storage stability of PSCs. This study provides an alternative passivator for the development of high-performance and long-term stable PSCs.

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.