ArticleSmall (Weinheim an der Bergstrasse, Germany)2026
The Ferrocene-Based Complex Enables Defect-Suppressed and Strain-Relaxed Interfaces in Inverted Perovskite Solar Cells.
Article in Small (Weinheim an der Bergstrasse, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Inverted (p-i-n) perovskite solar cells offer advantages such as low fabrication temperatures and minimal hysteresis, but their performance is limited by energy level misalignment and non-radiative recombination at the hole transport layer/perovskite interface. Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), a common hole transport material, has a hydrophobic surface and poor interface contact with perovskite, limiting device efficiency and stability. To address this, we introduce 1,1'-bis(diphenylphosphino)ferrocene (DPPF), a traditional ferrocene-based complex with dual phosphine coordination sites, for interface modification between PTAA and perovskite. DPPF optimizes energy level alignment, reduces the hole extraction barrier, and forms strong coordination bonds with uncoordinated Pb
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