Built-In Electric Field-Promoted Perovskite p-n Heterojunction for Efficient and Selective CO2 Photocatalysis.
Rapid charge carrier recombination and limited charge transport constrain the efficiency of semiconductor-based CO2 photoreduction. To address both limitations, p-type Cu2O was coupled with n-type Cs2AgBiBr6 (CABB) to construct a p-n heterojunction, in which the interfacial built-in electric field facilitates charge se...