Modulation and Optoelectronic Applications of van der Waals Interlayer Excitons

Interlayer coupling between two-dimensional homogeneous or heterogeneous materials provides conditions for the formation of interlayer excitons. Interlayer excitons, in the form of electron–hole pairs with electrons and holes separated in different component layers, are easily tuned due to such spatial structures, which hold significant potential for advanced optoelectronic devices. Consequently, extensive research has been conducted in recent years to investigate the formation process, exceptional properties, and high tunability of interlayer excitons. Herein, a comprehensive review will focus on the modulation and application of van der Waals interlayer excitons and not only summarizes the regulating methods, but also demonstrates the relative advancement of optoelectronic devices, aiming to provide guidance for future research endeavors in this field.