articleScienceFeb 26, 2026Closed access

Hafnium oxide interface stabilization for efficient, photothermally stable perovskite solar cells

YYYuanhang YangSCSiyang ChengXYXiaotian YangMLMubai LiXZXueliang Zhu

Wuhan University · Wuhan Institute of Technology · +2 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Organic molecular layers at both hole- and electron-selective interfaces are essential for achieving high-efficiency perovskite solar cells, yet their limited photothermal stability hinders long-term device operation. We used atomic layer deposition to deposit hafnium oxide (HfO x ) interlayers to stabilize these molecular interfaces under operational stress. At the NiO x /self-assembled monolayer (SAM) interface, a hydroxyl-rich, Lewis-acidic n-HfO x layer (n denotes negative fixed-charge polarity) promoted tridentate phosphonic acid coordination and enhanced SAM retention and thermal durability. At the perovskite/C 60 interface, the p-HfO x layer (p denotes positive fixed-charge polarity) anchored…

Citation impact

6
total citations
FWCI
51.72
Percentile
100%
References
60
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Authors

12

Topics & keywords

Topics
Keywords
  • Perovskite (structure)
  • Layer (electronics)
  • Monolayer
  • Atomic layer deposition
  • Oxide
  • Thermal stability
  • Iodide
  • Energy conversion efficiency
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