The Roles of Ion Migration on Perovskite Solar Cell Operational Stability at Various Illumination Intensities

IF 6 3区 工程技术 Q2 ENERGY & FUELS
Solar RRL Pub Date : 2025-06-01 DOI:10.1002/solr.202500162
Kenedy T. Tanko, Sonia R. Raga, Naji Vahedigharehchopogh, Fanny Baumann, Masoud Karimipour, Ramsés Alejandro Miranda-Gamboa, Monica Lira-Cantú
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Abstract

Monitoring the stability of perovskite solar cells (PSCs) under operational conditions is crucial for their development. This study integrates maximum power point (MPP) tracking with quasi in-situ electrochemical impedance spectroscopy at successive intervals to elucidate the temporal evolution of degradation mechanisms in PSCs. The gradual losses in photocurrent, photovoltage, and fill factor during MPP tracking were attributed to alterations in recombination processes, kinetic constants, shunt pathways, and series resistances, each manifesting at distinct phases of the PSC stability assessment. Notably, these variations correlated with a progressive increase in ionic density and mobility within the perovskite layer, as evidenced by a shift in the low-frequency ionic response and a 0.13 eV reduction in ionic activation energy. This apparent enhancement in ionic conductivity was more pronounced under illuminance levels below 1000Lx, predominantly affecting shunt resistance and leading to significant implications for indoor photovoltaic performance. The reported methodology offers a straightforward, non-destructive, and effective means to augment conventional PSC stability analyses across various lighting conditions.

Abstract Image

不同光照强度下离子迁移对钙钛矿太阳能电池稳定性的影响
监测钙钛矿太阳能电池(PSCs)在运行条件下的稳定性对其发展至关重要。本研究将最大功率点(MPP)跟踪与连续间隔的准原位电化学阻抗谱相结合,以阐明psc降解机制的时间演化。在MPP跟踪过程中,光电流、光电压和填充因子的逐渐损失归因于重组过程、动力学常数、分流途径和串联电阻的变化,这些变化在PSC稳定性评估的不同阶段表现出来。值得注意的是,这些变化与钙钛矿层内离子密度和迁移率的逐渐增加有关,低频离子响应的变化和离子活化能的0.13 eV的降低证明了这一点。这种离子电导率的明显增强在低于1000Lx的照度水平下更为明显,主要影响分流电阻,并导致对室内光伏性能的重大影响。所报道的方法提供了一种简单、非破坏性和有效的方法,以增加传统的PSC稳定性分析在各种照明条件下。
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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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