First-principles study on optoelectronic properties of Cs<sub>2</sub>PbX<sub>4</sub>–PtSe<sub>2</sub> van der Waals heterostructures
Xue Li, Liyuan Wu, Shuying Cheng, Changcheng Chen, Pengfei Lu
Abstract
Energy level graphs of the monolayer PtSe 2 and Cs 2 PbX 4 in the (a) precontact and (b) contact. The Cs 2 PbBr 4 –PtSe 2 heterostructure has a type-II level alignment which is conducive to spontaneously driving the holes and electrons to move forward in opposite directions.
Topics & Concepts
HeterojunctionMonolayervan der Waals forceElectronEnergy (signal processing)Materials scienceCondensed matter physicsOptoelectronicsNanotechnologyPhysicsQuantum mechanicsMoleculePerovskite Materials and Applications2D Materials and ApplicationsChalcogenide Semiconductor Thin Films