One-pot solution synthesis of 2D-3D mixed-dimensional perovskite crystalline lateral heterostructures
Tiebin Yang, Feng Li, Chun‐Ho Lin, Xinwei Guan, Yin Yao, Xudong Yang, Tom Wu, Rongkun Zheng
Abstract
Halide perovskites, owing to their excellent characteristics, have demonstrated huge potential in next-generation optoelectronic applications. Creating perovskite heterostructures, featuring the spatial modulation of physical properties, is expected to further boost device performance and open up new realms; however, direct growth of spatially defined mixed-dimensional lateral heterostructures remains a significant challenge. Here, we present a one-pot solution synthesis of two-three-dimensional (2D-3D) perovskite crystalline lateral heterostructures, leveraging their different temperature-dependent solubilities. A series of lateral heterostructures is demonstrated with well-defined interfaces and clear structural and optical modulations. Benefiting from the built-in field that effectively suppresses the dark current and separates the photogenerated carriers, the proof-of-concept photodetectors yield a low dark current less than 0.01 nA and a champion detectivity exceeding 1013 Jones. The general, facile synthesis of diverse mixed-dimensional perovskite lateral heterostructures provides a versatile hybrid material platform for exploring unique physics and affords new opportunities for advanced perovskite electronics.