Multifunctional Interfacial Molecular Bridging Strategy Enables Efficient and Stable Inverted Perovskite Solar Cells
© 2025 Wiley‐VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 34 vom: 11. Aug., Seite e2508352 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article defect passivation energy band alignment interfacial molecular bridge perovskite solar cells stability |
| Zusammenfassung: | © 2025 Wiley‐VCH GmbH. Interface engineering in inverted perovskite solar cells (PSCs) faces critical challenges arising from nonideal interfacial contact, defect accumulation, impeded carrier transport, and energy-level misalignment between the perovskite and electron transport layer, for example, phenyl-C61-butyric acid methyl ester (PCBM). These interfacial deficiencies collectively induce nonradiative recombination and degrade device stability. Herein, a multifunctional interfacial molecular bridging strategy using (benzhydrylthio)acetic acid (DSA) addresses the upper interfacial issues of inverted PSCs, achieving three synergistic roles. 1) Interfacial stabilization. A stable molecular-bridging layer is constructed with DSA at the perovskite/PCBM interface through carboxylate-Pb2⁺ coordination bonds, along with π-π stacking interactions between DSA and PCBM. 2) Defect passivation. Multiple active sites in DSA molecules, such as thioether and carboxylic acid groups, can synchronously achieve chemical passivation with undercoordinated Pb2+ sites. 3) Energy band alignment: DSA induces n-type band bending through electron donation by the thioether, reducing the work function and enhancing the electron-extraction kinetics. As a result, DSA-treated devices achieve a champion power conversion efficiency of 26.08% along with an open-circuit voltage loss of only 53 mV. Finally, the DSA-treated devices demonstrate remarkable operational stability, retaining 96% of the initial efficiency after being tracked at the maximum power point for 2000 h |
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| Beschreibung: | Date Revised 28.08.2025 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202508352 |