articleNature PhotonicsNov 7, 2025HYBRID OA

Stabilizing high-efficiency perovskite solar cells via strategic interfacial contact engineering

GLGuixiang LiZZZuhong ZhangBABenjamin Agyei‐TuffourLWLuyan WuTWThomas W. Gries

Southeast University · Ministry of Education · +13 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Abstract Surface passivation in perovskite solar cells can enhance device efficiency, yet incomplete interfacial functionality poses challenges to long-term reliability. Here we present a strategic interfacial engineering approach using sodium heptafluorobutyrate to fully functionalize the perovskite surface. Sodium heptafluorobutyrate acts as an ion shield that tunes the perovskite surface work function and increases the defect formation energy, resulting in an improved interface with the electron transport layer that minimizes recombination and boosts electron extraction under operation. We find that a sodium-heptafluorobutyrate-functionalized perovskite surface promotes a uniform, compact C 60 layer that…

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47
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26.95
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100%
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Authors

22

Topics & keywords

Topics
Keywords
  • Perovskite (structure)
  • Passivation
  • Energy conversion efficiency
  • Layer (electronics)
  • Work function
  • Surface engineering
  • Work (physics)
  • Thermal
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