Nanocrystal-Nucleus Template Strategy for Efficient Wide-Bandgap Perovskite Solar Cells with Enhanced Homogeneity and Energy-Level Alignment
© 2025 Wiley‐VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 38 vom: 08. Sept., Seite e2509202 |
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| 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 energy‐level alignment halide homogeneity nanocrystal‐nucleus template perovskite/silicon tandem solar cell wide‐bandgap perovskite |
| Zusammenfassung: | © 2025 Wiley‐VCH GmbH. Wide-bandgap (WBG) perovskite solar cells (PSCs) are critical for advancing tandem solar cell efficiencies, yet suffer from severe photovoltage deficits and halide segregation, substantially degrading their performance and stability. Here, a nanocrystal-nucleus template (NCNT) strategy is developed to directly addresses heterogeneous nucleation-the root cause of phase separation-by precisely matching the I/Br ratio of nanocrystal to that of the target perovskite film. This approach guides homogeneous assembly of Pb-I/Br octahedra, achieving exceptional halide uniformity and precise crystallization control for WBG films. The NCNT simultaneously induces p-type doping and reduces the perovskite/C60 interfacial energy barrier, significantly enhancing charge extraction. Remarkably, 1.68-eV WBG PSCs fabricated via this approach achieve a record open-circuit voltage (VOC) of 1.30 V, alongside a champion efficiency of 23.4%. The broad applicability of this strategy is demonstrated across a wide bandgap range of 1.63-1.76 eV, all exhibiting (001)-preferred orientation and exceptional photostability. When integrated into a 0.945 cm2 monolithic perovskite/silicon tandem solar cell, the NCNT-based device delivers a high efficiency of 32.0% (certified 31.7%). This work highlights the pivotal role of nanocrystals in regulating perovskite crystallization, resolves long-standing VOC limitations in WBG perovskites, and establishes a scalable platform for next-generation optoelectronic devices and tandem photovoltaics |
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| Beschreibung: | Date Revised 26.09.2025 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202509202 |