Recent progress in two-dimensional Ruddlesden–Popper perovskite based heterostructures

Abstract Two-dimensional (2D) perovskites have recently received increasing attention due to their enhanced environmental stability, layered nature and excellent optoelectronic characteristics. Particularly, the layered nature of 2D perovskites allows to conveniently integrate with other materials to form heterostructures, which can extend device functionalities and improve the performance of the corresponding optoelectronic devices. In this review, we aim to provide a comprehensive presentation of the recent advances of 2D perovskite based heterostructures. We will first give a brief overview on the structure and basic optical properties of 2D perovskites. Then we will focus on 2D perovskite based heterostructures including 2D/2D perovskites, 2D/three dimensional perovskites, 2D perovskites with 2D layered materials as well as 2D perovskites with other optoelectronic materials. Finally, we will outline the current challenges and future research directions in the field of 2D perovskite based heterostructures.