Bilayer interfacial engineering with PEAI/OAI for synergistic defect passivation in high-performance perovskite solar cells DOI

Chentai Cao,

Yuli Tao,

Quan Yang

и другие.

Journal of Semiconductors, Год журнала: 2025, Номер 46(5), С. 052805 - 052805

Опубликована: Май 1, 2025

Abstract Interfacial defects and environmental instability at perovskite surfaces pose significant challenges for inverted solar cells (PSCs). Surface post-treatment strategies have emerged as a viable approach to improve film quality passivate defects. Although organic molecules can both grain boundaries via hydrogen or covalent bonding, their limited adsorption specificity often results in incomplete defect neutralization. In this work, we introduce bilayer passivation employing phenethylammonium iodide (PEAI) n-octylammonium (OAI) concurrently mitigate non-radiative recombination stability. PEAI passivates undercoordinated Pb 2+ surfaces, effectively eliminating deep-level traps suppressing losses. Meanwhile, OAI forms hydrophobic barrier on the surface through its long alkyl chains, inhibiting moisture penetration without compromising interfacial charge transport. As result, exhibits significantly enhanced optoelectronic performance stability, achieving champion power conversion efficiency (PCE) of 24.48%.

Язык: Английский

Bilayer interfacial engineering with PEAI/OAI for synergistic defect passivation in high-performance perovskite solar cells DOI

Chentai Cao,

Yuli Tao,

Quan Yang

и другие.

Journal of Semiconductors, Год журнала: 2025, Номер 46(5), С. 052805 - 052805

Опубликована: Май 1, 2025

Abstract Interfacial defects and environmental instability at perovskite surfaces pose significant challenges for inverted solar cells (PSCs). Surface post-treatment strategies have emerged as a viable approach to improve film quality passivate defects. Although organic molecules can both grain boundaries via hydrogen or covalent bonding, their limited adsorption specificity often results in incomplete defect neutralization. In this work, we introduce bilayer passivation employing phenethylammonium iodide (PEAI) n-octylammonium (OAI) concurrently mitigate non-radiative recombination stability. PEAI passivates undercoordinated Pb 2+ surfaces, effectively eliminating deep-level traps suppressing losses. Meanwhile, OAI forms hydrophobic barrier on the surface through its long alkyl chains, inhibiting moisture penetration without compromising interfacial charge transport. As result, exhibits significantly enhanced optoelectronic performance stability, achieving champion power conversion efficiency (PCE) of 24.48%.

Язык: Английский

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