Low-Dimensional Ligand-Driven Design of 2D/3D Perovskite Heterojunctions: Achieving Mitigated Nonradiative Recombination and Robust Stability for Next-Generation Solar Cells DOI
Xueru Liu,

Xianglong Sun,

Chen Ge

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Achieving efficient and stable perovskite solar cells (PSCs) is challenging due to nonradiative recombination, ion migration, film instability. This study designs low-dimensional (LD) ligands─benzimidazole (BIZ), 1H-benzimidazole, 6-methyl-, (6-MeBIm), 6-(trifluoromethyl)-, (6-TFBIm)─to construct LD/3D heterojunctions. Compared with BIZ 6-MeBIm (constructing 1D/3D heterojunction), the 2D/3D heterojunction constructed by 6-TFBIm successfully passivated different defects, resulting in a significant reduction recombination improved carrier transport, leading power conversion efficiency (PCE) of 25.25%, outperforming control devices (PCE: 22.97%). The PSCs exhibit superior humidity thermal stability, maintaining structural integrity under harsh conditions. These results underscore role tailored LD ligands optimizing quality, charge paving way for high-performance durable PSCs.

Language: Английский

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

Chentai Cao,

Yuli Tao,

Quan Yang

et al.

Journal of Semiconductors, Journal Year: 2025, Volume and Issue: 46(5), P. 052805 - 052805

Published: May 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%.

Language: Английский

Citations

1
Low-Dimensional Ligand-Driven Design of 2D/3D Perovskite Heterojunctions: Achieving Mitigated Nonradiative Recombination and Robust Stability for Next-Generation Solar Cells DOI
Xueru Liu,

Xianglong Sun,

Chen Ge

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Achieving efficient and stable perovskite solar cells (PSCs) is challenging due to nonradiative recombination, ion migration, film instability. This study designs low-dimensional (LD) ligands─benzimidazole (BIZ), 1H-benzimidazole, 6-methyl-, (6-MeBIm), 6-(trifluoromethyl)-, (6-TFBIm)─to construct LD/3D heterojunctions. Compared with BIZ 6-MeBIm (constructing 1D/3D heterojunction), the 2D/3D heterojunction constructed by 6-TFBIm successfully passivated different defects, resulting in a significant reduction recombination improved carrier transport, leading power conversion efficiency (PCE) of 25.25%, outperforming control devices (PCE: 22.97%). The PSCs exhibit superior humidity thermal stability, maintaining structural integrity under harsh conditions. These results underscore role tailored LD ligands optimizing quality, charge paving way for high-performance durable PSCs.

Language: Английский

Citations

0