Recent Progress in Organic Photodetectors and their Applications

Ren, Haoran; Chen, Jingde; Li, Yanqing; Tang, Jian‐Xin

doi:10.1002/advs.202002418

Cited by 327 publications

(271 citation statements)

References 164 publications

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“…At present, the maximum thermoelectric conversion efficiency is about 12%. [100] The lowest NEP of the existing PTE-based THz detectors at 0.3-3 THz is 80 pW Hz -1/2 (at 2.52 THz), and the NEP of most detectors is ≈10 2 pW Hz -1/2 at room temperature. Graphene is the most promising material [71] Copyright 2018, Wiley-VCH.…”

Section: Comparison With Commercially Available Detectorsmentioning

confidence: 95%

Photodetectors of 2D Materials from Ultraviolet to Terahertz Waves

2021

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2D materials are considered to be the most promising materials for photodetectors due to their unique optical and electrical properties. Since the discovery of graphene, many photodetectors based on 2D materials have been reported. However, the low quantum efficiency, large noise, and slow response caused by the thinness of 2D materials limit their application in photodetectors. Here, recent progress on 2D material photodetectors is reviewed, covering the spectrum from ultraviolet to terahertz waves. First the interaction of 2D materials with light is analyzed in terms of optical physics. Then the present methods to improve the performance of 2D material photodetectors are summarized, such as defect engineering, p–n junctions and hybrid detectors, and the issue of serious overestimation of the performance in reported photodetectors based on 2D materials is discussed. Next, a comparison of 2D material photodetectors with traditional commercially available detectors shows that it is difficult to balance the current 2D material photodetectors with regard to having simultaneously both high sensitivity and fast response. Finally, a possible novel EIW mechanism is suggested to advance the performance of 2D material photodetectors in the future.

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Section: Comparison With Commercially Available Detectorsmentioning

confidence: 95%

Photodetectors of 2D Materials from Ultraviolet to Terahertz Waves

2021

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“…non-fullerene materials have largely compensated for the shortcomings of traditional inorganic photo detectors due to their inherent advantages, such as ease of processing, low-cost manufacturing, adjustable optoelectronic properties, and compatibility with flexible substrates, becoming emerging candidates for next-generation wearable electronic devices. [5][6][7] Over the past decades, solution-processed photodiode-type OPDs without additional gain mechanisms have achieved breakthrough development in crucial performance parameters, which have caught up to or even exceeded the performance of traditional inorganic photodetectors. [5,8,9] In 2017, Wang et al synthesized a series of donor-acceptor (D-A) polymers by designing a new dithienobenzotrithiophen (DTBTT) donor unit to expand the absorption spectrum, successfully developing a near-infrared (NIR) photodetector with a wide spectrum response covered 300-1600 nm.…”

Section: Introductionmentioning

confidence: 99%

Fast Response Organic Tandem Photodetector for Visible and Near‐Infrared Digital Optical Communications

Liu

Jiang

Wang

et al. 2021

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Organic photodetectors (OPDs), which usually work as photodiodes, photoconductors, or phototransistors, have emerged as candidates for next‐generation light sensing. However, low response speed caused by low carrier mobility and resistance‐capacitance (RC) time constant, severely hinders the commercialization of OPDs. Herein, the authors demonstrate a state‐of‐the‐art OPD with a record response speed of 146.8 ns by employing tandem structure to simultaneously reduce both the carrier transit time and RC time constant of the device, which is faster than that of previously reported OPDs as far as they know. Moreover, benefitting from the multi‐level barrier enhancement and voltage division engendered by tandem structure, an ultralow noise current of 7.82 × 10−14 A Hz−1/2 is obtained, as well as a wide detection range in 300–1000 nm. In addition, the tandem OPDs are successfully integrated into the optical communication system as signal receivers, demonstrating the precise digital signal communication from visible to near‐infrared light. It is believed that tandem OPDs have promising application potential in the wireless transmission system.

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“…Traditional semiconductor Schottky photodetectors are currently widely used in commercial photodetectors. The current key issue is constructing a 2D material heterostructure photodetector with high detectability and large-scale manufacturing capabilities [137]. Deng et al fabricated transverse graphene/MoS 2 Schottky junctions (Figure 9c), which benefited from strong absorption of light, efficient separation of photoexcited carriers, and fast charge transport in Schottky junction devices with responsivity up to 105 A/W (Figure 9g) [94].…”

Section: D Materials Heterostructurementioning

confidence: 99%

Mechanism, Material, Design, and Implementation Principle of Two-Dimensional Material Photodetectors

et al. 2021

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Two-dimensional (2D) materials may play an important role in future photodetectors due to their natural atom-thin body thickness, unique quantum confinement, and excellent electronic and photoelectric properties. Semimetallic graphene, semiconductor black phosphorus, and transition metal dichalcogenides possess flexible and adjustable bandgaps, which correspond to a wide interaction spectrum ranging from ultraviolet to terahertz. Nevertheless, their absorbance is relatively low, and it is difficult for a single material to cover a wide spectrum. Therefore, the combination of phototransistors based on 2D hybrid structures with other material platforms, such as quantum dots, organic materials, or plasma nanostructures, exhibit ultra-sensitive and broadband optical detection capabilities that cannot be ascribed to the individual constituents of the assembly. This article provides a comprehensive and systematic review of the recent research progress of 2D material photodetectors. First, the fundamental detection mechanism and key metrics of the 2D material photodetectors are introduced. Then, the latest developments in 2D material photodetectors are reviewed based on the strategies of photocurrent enhancement. Finally, a design and implementation principle for high-performance 2D material photodetectors is provided, together with the current challenges and future outlooks.

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Recent Progress in Organic Photodetectors and their Applications

Cited by 327 publications

References 164 publications

Photodetectors of 2D Materials from Ultraviolet to Terahertz Waves

Photodetectors of 2D Materials from Ultraviolet to Terahertz Waves

Fast Response Organic Tandem Photodetector for Visible and Near‐Infrared Digital Optical Communications

Mechanism, Material, Design, and Implementation Principle of Two-Dimensional Material Photodetectors

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