Two‐Dimensional Metal Halide Perovskites: Theory, Synthesis, and Optoelectronics

Abstract

Two‐dimensional (2D) materials attract great attention due to their unique and novel properties in optics, electronics, magnetics, etc. Various 2D materials have been developed since the discovery of graphene, including hexagonal boron nitrides (h‐BNs), transition‐metal dichalcogenides (TMDs), black phosphorus, and so on. Meanwhile, metal halide perovskites are also of great interest because of their high absorbance, high quantum yield, color tunability in the visible‐light range, and high color purity with narrow full width at half maximum (FWHM). Thus, what happens if 2D materials and metal halide perovskites combine? Here work on 2D metal halide perovskites, a class of new 2D materials, is introduced. Besides the advantages of metal halide perovskites, such as high quantum yield, high color purity, and so on, 2D materials are suitable for flexible and wearable devices, giving 2D metal halide perovskites a more and more important role in energy, information displays, illumination, and many other applications.

High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure

“…The approximate trend of detectivity is similar to the responsivity. From the curves, we can note that the device with ZnO NAs annealed in vacuum shows the highest detectivity, which exceeds 10 14 cm Hz 1/2 W −1 at 450 nm and is comparable to that reported in other papers (see Table 2) [25][26][27].…”

Organic–inorganic metal halide hybrids beyond perovskites

“…Reducing number of layers leads to an increase in band gap due to the stronger quantum confinement [82][83][84] and the increase of the exciton binding energy [85]. Recently, 2D and quasi-2D metal halide perovskites received great research attention for their higher stability than their 3D counterparts [86].…”

Perovskite Quantum Dot Light-Emitting Diodes

“…The appealing properties of this new class of materials that might enable advances in electroluminescent devices are their outstanding optical properties including the narrow emission band (<20 nm), a wide wavelength tunability (400-800 nm), and a high PL quantum yield, which make them suitable for high-performance, low-cost, and lightweight LED applications [9][10][11]. Beyond LEDs, they were also explored as interesting materials for low-threshold lasing [12], photodetectors [13], and solar cells [14]. And, many studies on these fields have been reported recently.…”