Interface Field Engineering of Weakly Alkaline-Treated PEDOT:PSS for Enhanced Performance and Stability of Tin-Based Perovskite Solar Cells DOI
Yi Jing,

Chensi Gong,

A. Shen

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 5258 - 5264

Опубликована: Май 19, 2025

State-of-the-art tin-based perovskite solar cells (TPSCs) commonly use a water-based poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transport layer. However, the strong acidity of PEDOT:PSS, arising from deprotonation its -SO3H group in PSS chains due to low acid dissociation constant (pKa), often degrades tin films, compromising both device performance and stability TPSCs. Here, we present novel interface engineering strategy using ammonium hydroxide (NH4OH) treated which effectively neutralizes acidic groups while simultaneously improving quality films preferentially oriented crystal growth. Besides, this improves conductivity layer suppresses charge recombination high-quality films. As result, devices achieve remarkable power conversion efficiency 13.3%, alongside significant improvements stability. Notably, unencapsulated retain 85% their initial after approximately 1600 h N2. Our method marks advancement, integrating enhanced with improved durability offering scalable pathway for commercialization photovoltaics.

Язык: Английский

Interface Field Engineering of Weakly Alkaline-Treated PEDOT:PSS for Enhanced Performance and Stability of Tin-Based Perovskite Solar Cells DOI
Yi Jing,

Chensi Gong,

A. Shen

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 5258 - 5264

Опубликована: Май 19, 2025

State-of-the-art tin-based perovskite solar cells (TPSCs) commonly use a water-based poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transport layer. However, the strong acidity of PEDOT:PSS, arising from deprotonation its -SO3H group in PSS chains due to low acid dissociation constant (pKa), often degrades tin films, compromising both device performance and stability TPSCs. Here, we present novel interface engineering strategy using ammonium hydroxide (NH4OH) treated which effectively neutralizes acidic groups while simultaneously improving quality films preferentially oriented crystal growth. Besides, this improves conductivity layer suppresses charge recombination high-quality films. As result, devices achieve remarkable power conversion efficiency 13.3%, alongside significant improvements stability. Notably, unencapsulated retain 85% their initial after approximately 1600 h N2. Our method marks advancement, integrating enhanced with improved durability offering scalable pathway for commercialization photovoltaics.

Язык: Английский

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