Intrinsic and extrinsic stability of triple-cation perovskite solar cells through synergistic influence of organic additive

Sawanta S. Mali, Jyoti V. Patil, Dae Woong Park, Young Hee Jung, Chang Kook Hong*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)
8 Downloads (Pure)

Abstract

Surface- or bulk-passivation using organic additives plays a critical role in improving the performance and stability of hybrid perovskite solar cells (HPSCs). Here, we report 2-hydroxyethyl acrylate (HEA) as an additive to reduce crystallization and passivate defects. Because of the dual functionality of the HEA additive, the optimized HPSCs yield 22.05% and 21.46% power conversion efficiency (PCE), respectively, for mesostructured negative-intrinsic-positive (n-i-p)- and planar positive-intrinsic-negative (p-i-n)-type device configurations, which is much higher than control devices. Large devices with 1 cm2 active area also produce a promising 20.03% PCE, which is comparable to the current efficiency. Time-of-flight secondary ion mass spectroscopy (TOF-SIMS) measurement analysis indicates the HEA settles not only in grain boundaries but also within the perovskite grain, which facilitates passivation and suppresses halogen-ion migration. Importantly, photostability analysis reveals negligible efficiency loss over 1,000 h under continuous 1 sun illumination under different environmental conditions.
Original languageEnglish
Article number100906
Number of pages22
JournalCell Reports Physical Science
Volume3
Issue number6
Early online date25 May 2022
DOIs
Publication statusPublished - 15 Jun 2022

Keywords

  • triple-cation perovskite solar cells
  • dual-functional additive
  • 2-hydroxyethyl acrylate
  • grain size
  • defect passivation
  • ion-migration suppression
  • stability
  • material advancement progression

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