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Lookup NU author(s): Dr Zheyang Shen
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© 2023 Wiley-VCH GmbH.The fabrication of perovskite solar cells (PSCs) through blade coating is seen as one of the most viable paths toward commercialization. However, relative to the less scalable spin coating method, the blade coating process often results in more defective perovskite films with lower grain uniformity. Ion migration, facilitated by those elevated defect levels, is one of the main triggers of phase segregation and device instability. Here, a bifunctional molecule, p-aminobenzoic acid (PABA), which enhances the barrier to ion migration, induces grain growth along the (100) facet, and promotes the formation of homogeneous perovskite films with fewer defects, is reported. As a result, PSCs with PABA achieved impressive power conversion efficiencies (PCEs) of 23.32% and 22.23% for devices with active areas of 0.1 cm2 and 1 cm2, respectively. Furthermore, these devices maintain 93.8% of their initial efficiencies after 1 000 h under 1-sun illumination, 75 °C, and 10% relative humidity conditions.
Author(s): Zhu H, Shao B, Yin J, Shen Z, Wang L, Huang R-W, Chen B, Wehbe N, Ahmad T, Abulikemu M, Jamal A, Gereige I, Freitag M, Mohammed OF, Sargent EH, Bakr OM
Publication type: Article
Publication status: Published
Journal: Advanced Materials
Year: 2024
Volume: 36
Issue: 9
Print publication date: 01/03/2024
Online publication date: 01/11/2023
Acceptance date: 01/11/2023
ISSN (print): 0935-9648
ISSN (electronic): 1521-4095
Publisher: John Wiley and Sons Inc.
URL: https://doi.org/10.1002/adma.202306466
DOI: 10.1002/adma.202306466
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