A donor-acceptor zwitterion as a self-assembled hole-selective layer for highly efficient tin-based perovskite solar cells.

ABSTRACT: The development of tin-based perovskite solar cells (TPSCs) has lagged far behind that of their lead-based counterparts. Although high-efficiency TPSCs have been reported in recent years, they are all based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the hole-selective layer (HSL), whose strong acidity and hygroscopicity are undoubtedly highly detrimental to the long-term stability of the devices. Here, a donor-acceptor-type zwitterionic molecule (PyPs) was designed by employing a triphenylamine donor and a benzo[c][1,2,5]thiadiazole acceptor as the molecular backbone, functionalized with a pyridinium sulfonate terminal group. The ionic sulfonate group in PyPs not only exhibits stronger coordination with indium tin oxide (ITO), enabling uniform surface

SUBMITTER: Chang Q 

PROVIDER: S-EPMC12805863 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature