Benzylphosphonic Acid-Engineered Compact Self-Assembled Monolayers for Bifacial Buried Interface Passivation in High-Performance Inverted Perovskite Solar Cells.

ABSTRACT: While [4-(3,6-Dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) self-assembled monolayers (SAMs) enable high-performance inverted perovskite solar cells (PSCs), their sparse coverage on nickel oxide (NiOx) induces heterogeneous interfacial charge distribution at the buried perovskite interface. This increases non-radiative recombination, ultimately limiting device performance. Herein, benzylphosphonic acid (BPPA) is added, a small molecule featuring a phosphonic acid group, into Me-4PACz to construct a co-assembled monolayer (Co-SAM) with enhanced molecular ordering on NiOx. The resulting compact Co-SAM hole transport layer (HTL) simultaneously improves electrical conductivity, hole mobility, and interfacial energy level alignment, facilitating efficient hole injection. Moreover,

SUBMITTER: Zhang L 

PROVIDER: S-EPMC12677647 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature