Fig. 1: Operation mechanism of perovskite b-JFETs.

a, b Schematic of the perovskite b-JFET based on a PEA2SnI4/IGZO heterojunction and the schematic illustration of the working mechanism. c, d Schematic illustration of the electron flow within the device and the corresponding energy band diagram of the perovskite b-JFETs before and after the oxidation process.