Morphology‐Tailored Halide Perovskite Platelets and Wires: From Synthesis, Properties to Optoelectronic Devices

Abstract The recent emergence of metal‐halide perovskites as light absorbers in solar cells has attracted lots of attention on their synthesis and properties. In particular, low‐dimensional metal‐halide perovskites like platelets and wires are expected to regulate their optical and electrical properties in reference to bulk counterparts as a result of quantum confinement and anisotropy. In this review, first, the recent solution‐ and vapor‐based approaches on synthesizing metal‐halide perovskite platelets and wires are highlighted. Then, their optical and electrical properties along with application in photonics and optoelectronics such as lasers, light emitting diodes, photodetectors, and phototransistors are discussed. At last, the importance of such perovskite platelets and wires on improving material stability and transport properties is emphasized, and potential integration of perovskites with other low‐dimensional materials in multifunctional systems is proposed.