Melatonin treatment as an anti-aging therapy for UV-related degradation of perovskite solar cells

Liu, Fei; Valencia, Agnes; Zhu, Yuhua; Zhang, Xiangyang; Li, Weilu; Daoud, Walid A.

doi:10.1039/d4ta01332h

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta01332h

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Melatonin treatment as an anti-aging therapy for UV-related degradation of perovskite solar cells

Fei Liu,

Agnes Valencia,

Yuhua Zhu

et al.

Abstract: Perovskite solar cells exhibit immense potential for practical use due to their high power conversion efficiency (PCE) and low fabrication cost. However, UV light is an unavoidable threat to long-term...

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Mechanisms of UV-Induced Degradation in Wide-Bandgap Perovskite Solar Cells: Insights from Microscopic Analysis

Lang,

Gao,

Zhao

et al. 2024

ACS Appl. Energy Mater.

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Wide-bandgap (WBG) perovskite solar cells (PSCs) show great potential as the top subcells in tandem devices, yet their vulnerability to ultraviolet (UV) radiation remains a significant barrier to commercialization. This study investigates the mechanisms of UV-induced degradation in WBG devices and films through comprehensive failure analysis. By integrating macroscopic electrical performance evaluations with detailed microscopic characterization, we focus on key aspects such as conductivity, leakage current pathways, defect evolution, and nanomechanical properties. Our results reveal that the primary causes of performance degradation are reductions in short-circuit current and fill factor, accompanied by increased hysteresis. This degradation appears to stem from a malfunctioning junction or increased interfacial recombination, due to high-energy UV photons damaging the junction interface or inducing shallow interfacial defects. Our observations indicate that UV irradiation causes up to a 90% reduction in conductivity and a 5-fold increase in leakage current, particularly at grain boundaries due to interfacial defects. Negative ions accumulate first at the grain boundaries, accompanied by a 75% decrease in the Young's modulus. These findings highlight the critical need to stabilize the light-facing interface or strengthen the near-surface region of perovskite materials to mitigate the harmful effects of UV exposure.

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Mechanisms of UV-Induced Degradation in Wide-Bandgap Perovskite Solar Cells: Insights from Microscopic Analysis

Lang,

Gao,

Zhao

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

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Melatonin treatment as an anti-aging therapy for UV-related degradation of perovskite solar cells

Abstract: Perovskite solar cells exhibit immense potential for practical use due to their high power conversion efficiency (PCE) and low fabrication cost. However, UV light is an unavoidable threat to long-term...

Cited by 1 publication

References 62 publications

Mechanisms of UV-Induced Degradation in Wide-Bandgap Perovskite Solar Cells: Insights from Microscopic Analysis

Mechanisms of UV-Induced Degradation in Wide-Bandgap Perovskite Solar Cells: Insights from Microscopic Analysis

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