Photogenerated carrier dynamics at the BC/g-CN interface.

Developing van der Waals (vdW) heterostructures is an excellent approach for optimizing exceptional optoelectronic and photocatalytic properties of materials; therefore, researching the interface dynamics of charge carriers at the two-dimensional vdW heterojunction is of great significance. In this work, we perform time-dependent non-adiabatic molecular dynamics simulations to study the dynamics of charge transfer at the BC/g-CN heterostructure. The simulations show that the charge transfer between BC/g-CN layers is mainly caused by the non-adiabatic mechanism. The non-adiabatic mechanism leads to a higher charge-transfer efficiency and slows down the process of interlayer electron-hole recombination, thereby promoting the separation of photogenerated electron-hole pairs. Our investigation provides essential insights into understanding the dynamics of charge transfer for the BC/g-CN heterostructure, which provides guidance for photocatalytic water splitting and optoelectrical applications.