Micro-changes, macro-impact: enhancing hole transfer by tailoring peripheral substituents of hole transport materials for efficient perovskite solar cells.

ABSTRACT: Optimizing hole transfer at the perovskite/hole transport layer (HTL) interface remains critical for enhancing the efficiency and stability of perovskite solar cells (PSCs). Herein, we design a series of small-molecule-based hole transport materials (HTMs) via systematic tuning of peripheral functional group positions, aiming to enhance heterogeneous interfacial charge transfer at the perovskite/HTL interface. Among them, HTM 9,9'-([1,1'-biphenyl]-4,4'-diyl)bis(N ³,N ⁶-bis(7-methoxy-9,9-dimethyl-9H-fluoren-2-yl)-N ³,N ⁶-bis(4-(methylthio)phenyl)-9H-carbazole-3,6-diamine) (OPSF) exhibits superior intrinsic properties and adopts a well-aligned planar adsorption configuration on the perovskite surface

SUBMITTER: Xia Z 

PROVIDER: S-EPMC12833687 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature