Retarding Ion Migration for Stable Blade-Coated Inverted Perovskite Solar Cells

Hongwei Zhu, Bingyao Shao, Jun Yin, Zhongjin Shen, Lijie Wang, Ren Wu Huang, Bin Chen, Nimer Wehbe, Taimoor Ahmad, Mutalifu Abulikemu, Aqil Jamal, Issam Gereige, Marina Freitag, Omar F. Mohammed, Edward H. Sargent, Osman M. Bakr

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number2306466
JournalAdvanced Materials
Volume36
Issue number9
DOIs
Publication statusPublished - 1 Mar 2024

Keywords

  • blade coating
  • perovskite solar cells
  • retarding ion migration

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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