Chiral-Structured Heterointerfaces Enable Durable Perovskite Solar Cells

Tianwei Duan, Shuai You, Min Chen, Wenjian Yu, Yanyan Li, Peijun Guo, Joseph Berry, Joseph Luther, Kai Zhu, Yuanyuan Zhou

Research output: Contribution to journalArticlepeer-review

10 Scopus Citations

Abstract

Mechanical failure and chemical degradation of device heterointerfaces can strongly influence the long-term stability of perovskite solar cells (PSCs) under thermal cycling and damp heat conditions. We report chirality-mediated interfaces based on R-/S-methylbenzyl-ammonium between the perovskite absorber and electron-transport layer to create an elastic yet strong heterointerface with increased mechanical reliability. This interface harnesses enantiomer-controlled entropy to enhance tolerance to thermal cycling-induced fatigue and material degradation, and a heterochiral arrangement of organic cations leads to closer packing of benzene rings, which enhances chemical stability and charge transfer. The encapsulated PSCs showed retentions of 92% of power-conversion efficiency under a thermal cycling test (-40 degrees C to 85 degrees C; 200 cycles over 1200 hours) and 92% under a damp heat test (85% relative humidity; 85 degrees C; 600 hours).
Original languageAmerican English
Pages (from-to)878-884
Number of pages7
JournalScience
Volume384
Issue number6698
DOIs
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5900-90016

Keywords

  • chiral
  • perovskite
  • solar cells
  • stability

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