Localized Lead-Chelating Insulator Bottom Contact for Efficient and Stable p-i-n Perovskite Solar Cells.

ABSTRACT: The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance of p-i-n structure perovskite solar cells (PSCs). Here, that adding an ultrathin local contact layer of lead chelation polymer poly (methyl methacrylate) (PMMA) on PTAA HTLs is reported to fill its pinholes and strongly coordinate with the bottom uncoordinated Pb²⁺ simultaneously, resulting in a reduced amorphous region in perovskites near HTLs and a passivated perovskite bottom surface. Transient reflection (TR) spectroscopy results show that the ultrathin insulation layer does not affect the charge transport and collection efficiency at the PTAA and perovskite interface. This locally contacted PMMA can trigger a template-induced specific facet orientation growth, regulating th

SUBMITTER: Li Y 

PROVIDER: S-EPMC12533327 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature