2D Material and Perovskite Heterostructure for Optoelectronic Applications

Abstract

Optoelectronic devices are key building blocks for sustainable energy, imaging applications, and optical communications in modern society. Two-dimensional materials and perovskites have been considered promising candidates in this research area due to their fascinating material properties. Despite the significant progress achieved in the past decades, challenges still remain to further improve the performance of devices based on 2D materials or perovskites and to solve stability issues for their reliability. Recently, a novel concept of 2D material/perovskite heterostructure has demonstrated remarkable achievements by taking advantage of both materials. The diverse fabrication techniques and large families of 2D materials and perovskites open up great opportunities for structure modification, interface engineering, and composition tuning in state-of-the-art optoelectronics. In this review, we present comprehensive information on the synthesis methods, material properties of 2D materials and perovskites, and the research progress of optoelectronic devices, particularly solar cells and photodetectors which are based on 2D materials, perovskites, and 2D material/perovskite heterostructures with future perspectives.

Salt‐Assisted Low‐Temperature Growth of 2D Bi2O2Se with Controlled Thickness for Electronics

“…2D black phosphorous and 2D perovskite are mostly unstable in the air, and the growth of these materials is onerous by traditional chemical vapor deposition (CVD), restricting their widespread electronic applications. [20][21][22] As an alternative, 2D transition metal dichalcogenides (TMDCs) are suitable candidates for high-performance optoelectronics attributable to the layer-dependent optical absorption; however, the low-carrier mobility of these materials hinders their execution in electronics. [23,24] It is, therefore, necessary to explore an air-stable 2D material with suitable bandgap and high carrier mobility for electronic and optoelectronic applications.…”

Vertical‐type 3D/Quasi‐2D n‐p Heterojunction Perovskite Photodetector

“…[27] To solve such problems, 2D and quasi-2D perovskites have been developed to improve the property of conventional 3D perovskites. [28][29][30][31][32][33][34] The low-dimensional layered perovskite has recently raised increasing attention due to their better thermal, chemical, and environmental stability compared to their 3D counterparts as well as the intrinsic band structure tunability. These materials can be visualized by cutting the typical perovskite 3D crystal consisting of corner-sharing lead halide octahedra along (100), (110), and (111) directions and inserting bulky organic spacer cations, where 2D perovskites are obtained when one octahedral layer is separated by spacer cations (n = 1), while Q-2D perovskites are obtained when n octahedral layers (n = 2, 3,…) are separated by organic cations.…”

“…Several researchers have reported on the study of 2D or Q‐2D perovskite photodetector. [ 33–37 ] J. W. Lim et al. have systematically studied the perovskite photodiodes with the Q‐2D photoactive layer as a function of n values.…”

2D Nanostructures for Optoelectronic and Green Energy Devices

“…In this Special Issue “2D Nanostructures for Optoelectronic and Green Energy Devices”, we have collected nine high-quality, original research papers and one comprehensive review paper by outstanding scientists and engineers from relevant fields, covering the topics in optical properties and couplings in 2D nanostructures, [ 5 , 6 , 7 , 8 ] spectroscopic analysis in atomic scale, [ 9 ] 2D transistors, [ 10 , 11 ] 2D optoelectronics, [ 12 ] and 2D energy storage applications [ 13 , 14 ].…”

“…Last, the Special Issue includes a comprehensive review on the applications on 2D materials, perovskites, and 2D material/perovskite heterostructures for applications to optoelectronic devices, including solar cells and photodetectors, nicely summarized by Yuljae Cho and his co-workers [ 12 ]. Especially, the review summarizes various synthetic methods for 2D materials and perovskite materials, and the photodetector performance of various materials was adequately compared and summarized.…”