Dion–Jacobson halide perovskites for photovoltaic and photodetection applications.

Hybrid halide perovskites have progressed as eminent semiconducting materials pioneering in the domain of low-cost thin film photovoltaics. Nevertheless, the intrinsic instability of the dominant three-dimensional (3D) perovskites impedes their potential applications in industrial-scale production and commercialization. Two-dimensional (2D) perovskite structures have surfaced as an achievable resolution to this contention. In 2D perovskites, large organic cations have been introduced as spacing cations to isolate the inorganic metal halide octahedra layers and correspondingly promote the formation of quantum well superlattices. The photophysical properties of 2D perovskites can be widely tailored through the manipulation of composition, structure, and dimensionality, which provides a compelling field for researchers working in the fields of both chemistry and physics to unveil 2D perovskite materials for high-performance devices. The advancement of low-dimensional Dion–Jacobson (DJ) phase perovskites has lately attracted considerable attention in view of their appealing stability against harsh environmental conditions as well as their competitive performance in optoelectronic applications. Although the initial reports on photovoltaic solar cells (PSCs) based on DJ perovskites have exhibited comparatively poor performance, recent investigations have revealed that they have the capability to realize a high power conversion efficiency above 20%. In this review, we discuss the structural and optoelectronic characteristics of DJ perovskites, followed by a comprehensive investigation on the recent development in DJ PSCs and photodetectors. The conceivable approaches that can be deployed to expedite the advancement of DJ-based optoelectronic applications are also discussed. [ABSTRACT FROM AUTHOR]