Nonstoichiometric acid-base reaction as reliable synthetic route to highly stable CH₃NH₃PbI₃ perovskite film.

ABSTRACT: Perovskite solar cells have received worldwide interests due to swiftly improved efficiency but the poor stability of the perovskite component hampers the device fabrication under normal condition. Herein, we develop a reliable nonstoichiometric acid-base reaction route to stable perovskite films by intermediate chemistry and technology. Perovskite thin-film prepared by nonstoichiometric acid-base reaction route is stable for two months with negligible PbI₂-impurity under ∼65% humidity, whereas other perovskites prepared by traditional methods degrade distinctly after 2 weeks. Route optimization involves the reaction of PbI₂ with excess HI to generate HPbI₃, which subsequently undergoes reaction with excess CH₃NH₂ to deliver CH_3</

SUBMITTER: Long M 

PROVIDER: S-EPMC5476796 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature