Enhanced Performance of Fabricated Iodine-Rich Perovskite Solar Cells via Reverse-Biasing

IF 6 3区工程技术 Q2 ENERGY & FUELS

Solar RRL Pub Date : 2025-05-13 DOI:10.1002/solr.202500066

Yingfeng Li, Zixuan Wang, Peici Yu, Yuewen Chen, Rongxin Wu, Xing Zhao, Peng Cui, Hao Huang, Meicheng Li

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引用次数: 0

Abstract

Perovskite solar cells (PSCs) are undergoing rapid development and exhibit considerable potential for commercialization. Recent studies have shown that reverse bias can improve the open-circuit voltage (V_OC) of PSCs by ≈0.06 V due to the migration of iodine ions filling vacancies at the electron transport layer (ETL)/perovskite interface. It can be deduced that in iodine-rich PSCs, the potential for reverse-biasing to enhance V_OC is limited due to the suppression of iodine vacancies by excess iodine atoms. This work confirms that, in iodine-rich PSCs, reverse bias has a minimal effect on V_OC, but leads to a ≈3.9% increase in short-circuit current density (J_SC), from 25.40 to 26.40 mA/cm², and an enhancement of ≈3.2% in power conversion efficiency from 23.00% to 23.74%. The improved J_SC can be attributed to reduced carrier recombination near the ETL/perovskite interface, as evidenced by enhanced external quantum efficiency and increased recombination resistance in the short-wavelength region. These insights suggest a practical posttreatment strategy for high-performance PSCs.

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通过反偏置增强富碘钙钛矿太阳能电池的性能

钙钛矿太阳能电池（PSCs）正在快速发展，并显示出相当大的商业化潜力。最近的研究表明，由于碘离子的迁移填充了电子传输层(ETL)/钙钛矿界面的空位，反向偏置可以使PSCs的开路电压（VOC）提高约0.06 V。可以推断，在富碘psc中，由于过量的碘原子抑制了碘空位，反向偏置增强VOC的潜力有限。本研究证实，在富碘psc中，反向偏置对VOC的影响很小，但导致短路电流密度（JSC）增加约3.9%，从25.40 mA/cm2增加到26.40 mA/cm2，功率转换效率从23.00%提高到23.74%，提高约3.2%。改进的JSC可以归因于ETL/钙钛矿界面附近载流子复合的减少，这可以通过增强外量子效率和增加短波长区域的复合电阻来证明。这些见解为高性能psc提供了一种实用的后处理策略。

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.