Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

Abstract

Recent years have witnessed skyrocketing research achievements in organic–inorganic hybrid lead halide perovskites (OIHPs) in the photovoltaic field. In addition to photovoltaics, more and more studies have focused on OIHPs‐based photodetectors in the past two years, due to the remarkable optoelectronic properties of OIHPs. This article summarizes the latest progress in this research field. To begin with, the factors influencing the performance of photodetectors are discussed, including both internal and external factors. In particular, the channel width and the incident power intensities should be taken into account to precisely and objectively evaluate and compare the output performance of different photodetectors. Next, photodetectors fabricated on single‐component perovskites in terms of different micromorphologies are discussed, namely, 3D thin‐film and single crystalline, 2D nanoplates, 1D nanowires, and 0D nanocrystals, respectively. Then, bilayer structured perovskite‐based photodetectors incorporating inorganic and organic semiconductors are discussed to improve the optoelectronic performance of their pristine counterparts. Additionally, flexible OIHPs‐based photodetectors are highlighted. Finally, a brief conclusion and outlook is given on the progress and challenges in the field of perovskites‐based photodetectors.

Graphene‐Assisted Growth of Patterned Perovskite Films for Sensitive Light Detector and Optical Image Sensor Application

“…), organic–inorganic hybrid perovskites have emerged as a promising class of candidate materials for a variety of optoelectronic applications including solar cells, photodetectors, light‐emitting diodes, and lasers . Currently, the majority of studies have been focused on the development of individual optoelectronic units composed of bulk polycrystalline thin films or single crystals of perovskite materials . From the view of many practical applications, development of optoelectronic device arrays are essential for diverse integrated optoelectronic devices and systems, which requires controllable and precise growth of high‐quality patterned perovskite materials with designed shapes .…”

Asymmetric Contact‐Induced Self‐Driven Perovskite‐Microwire‐Array Photodetectors

“…[1][2][3][4][5][6][7][8] As one group of the most promising optoelectronic semiconductors, perovskite possess a variety of appealing physical and optoelectronic properties, e.g., strong optical absorption coefficient, high carrier mobility, long carrier diffusion length, solution-based processibility and so on. [12][13][14][15][16] These detectors have achieved excellent photoresponse performance that can compete with www.advelectronicmat.de simple blade-coating method, and a CH 3 NH 3 PbI 3 MWs arraybased photodetector attained responsivity and specific detectivity of 13.57 A W −1 and 5.25 × 10 12 Jones, respectively. [12][13][14][15][16] These detectors have achieved excellent photoresponse performance that can compete with www.advelectronicmat.de simple blade-coating method, and a CH 3 NH 3 PbI 3 MWs arraybased photodetector attained responsivity and specific detectivity of 13.57 A W −1 and 5.25 × 10 12 Jones, respectively.…”

Flexible Quasi‐2D Perovskite/IGZO Phototransistors for Ultrasensitive and Broadband Photodetection

“…As inspired by these applications, various emerging materials, such as quantum dots, [5] carbon nanotubes, [6] graphene, [7] and transition-metal dichalcogenides, [8] are extensively explored for the efficient photodetection. [9][10][11] Although these OHP materials can be easily prepared by cost-effective solution-based processes to meet the ever-increasing consumer demands for large-area and flexible optoelectronics, their photodetectors usually exhibit the relatively low responsivity because of the limited carrier mobility as well as the absence of photoconductive gain (G) mechanism that can induce multiple charge carriers by one incident photon.In order to tackle these insufficient device performances, hybrid phototransistors by simply integrating perovskites (PVKs) with different 2D materials (e.g., graphene, [12] black phosphorus, [13,14] MoS 2 , [15] and WSe 2 [16] ) have been proposed and demonstrated. [9][10][11] Although these OHP materials can be easily prepared by cost-effective solution-based processes to meet the ever-increasing consumer demands for large-area and flexible optoelectronics, their photodetectors usually exhibit the relatively low responsivity because of the limited carrier mobility as well as the absence of photoconductive gain (G) mechanism that can induce multiple charge carriers by one incident photon.…”