Crystal orientation engineering in two-dimensional perovskites for improved photoelectric properties and applications

Abstract

Two-dimensional perovskite is considered an emerging semiconductor material because of its structural diversity and stability, making it useful in solar cells, light-emitting diodes, and lasers. However, compared with conventional three-dimensional perovskite materials, issues such as lower charge transport efficiency due to organic cation spacers could hinder their widespread use. Therefore, vertically oriented two-dimensional perovskites have been extensively studied because they can provide direct carrier transport channels, improve trap density, and reduce lattice stress. Here, the article summarizes two-dimensional vertically oriented perovskite from orientation methods, characterization methods, properties, and applications. Finally, the article discusses the challenges and expectations of developing two-dimensional oriented perovskites.