A Zwitterion Molecule Passivates the Charged Defects for High-Performance Inverted Perovskite Solar Cells

IF 6 3区工程技术 Q2 ENERGY & FUELS

Solar RRL Pub Date : 2025-09-15 DOI:10.1002/solr.202500566

Tong Wang, Xingyu Pu, Jiabao Yang, Junpeng Li, Junchao Liu, Ningning Zhao, Qian Zhang

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Abstract

Defects originating from the ionic nature of perovskite film are major factors that degrade the performance of perovskite solar cells (PSCs), and mitigating or removing them is essential for the implementation of high-performance PSCs. Herein, an additive 4-toluenesulfonic acid ammonium salt (TAAS) has been used to modify the perovskite film. The sulfonic acid groups (SO₃⁻) as an electron donor can not only regulate the growth of perovskite crystals, but also effectively passivate the positively charged defects caused by under-coordinated Pb²⁺. The ammonium ions (NH₄⁺) can effectively passivate cation vacancies through electrostatic interactions. Furthermore, the benzene ring can trap trace I₂ generated by oxidation in the perovskite active layer and reduce the I₂-induced acceptor defects. The power conversion efficiency of PSCs based on the optimized perovskite is significantly improved from 24.70% to 26.02%, and the stability of PSCs is also advanced.

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两性离子分子钝化高性能倒钙钛矿太阳能电池的带电缺陷

钙钛矿薄膜离子性质引起的缺陷是降低钙钛矿太阳能电池性能的主要因素，减轻或消除这些缺陷是实现高性能钙钛矿太阳能电池的关键。本文采用添加剂4-甲苯磺酸铵盐（TAAS）对钙钛矿薄膜进行了改性。磺酸基（SO3−）作为电子给体不仅可以调节钙钛矿晶体的生长，而且可以有效钝化由Pb2+欠配位引起的带正电缺陷。铵离子（NH4+）可以通过静电相互作用有效钝化阳离子空位。此外，苯环可以捕获钙钛矿活性层中氧化产生的痕量I2，减少I2诱导的受体缺陷。优化后的钙钛矿基PSCs的功率转换效率由24.70%提高到26.02%，并提高了PSCs的稳定性。

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

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.