Hybrid structures of organic dye and graphene for ultrahigh gain photodetectors

Lee, Youngbin; Yu, Seong Hun; Jeon, Jiwon; Kim, Hyunmin; Lee, Jun Young; Kim, Hyungjun; Ahn, Jong Hyun; Hwang, E. H.; Cho, Jeong Ho

doi:10.1016/j.carbon.2015.02.071

Cited by 70 publications

(46 citation statements)

References 37 publications

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“…Similar to 2D/QDs detectors, the organic molecules or polymers can also be used to sensitize the surface of 2D channels thus producing a significant photoconductive gain through the photogating effect. Lee et al fabricated a hybrid photodetector comprising organic dye molecules (rhodamine 6G, R6G) and graphene with broad spectral photoresponse and responsivity of 460 A W −1 . Liu et al have epitaxially grown small‐molecule C 8 ‐BTBT on top of graphene using a CVD approach and fabricated C 8 ‐BTBT/graphene hybrid phototransistors which can exhibit a photo responsivity of 10 4 A W −1 , a photogain larger than 10 8 , and a time response of 25 ms .…”

Section: D‐based Photodetectorsmentioning

confidence: 99%

Recent Progress and Future Prospects of 2D‐Based Photodetectors

2018

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Conventional semiconductors such as silicon- and indium gallium arsenide (InGaAs)-based photodetectors have encountered a bottleneck in modern electronics and photonics in terms of spectral coverage, low resolution, nontransparency, nonflexibility, and complementary metal-oxide-semiconductor (CMOS) incompatibility. New emerging two-dimensional (2D) materials such as graphene, transition metal dichalcogenides (TMDs), and their hybrid systems thereof, however, can circumvent all these issues benefitting from mechanically flexibility, extraordinary electronic and optical properties, as well as wafer-scale production and integration. Heterojunction-based photodiodes based on 2D materials offer ultrafast and broadband response from the visible to far-infrared range. Phototransistors based on 2D hybrid systems combined with other material platforms such as quantum dots, perovskites, organic materials, or plasmonic nanostructures yield ultrasensitive and broadband light-detection capabilities. Notably the facile integration of 2D photodetectors on silicon photonics or CMOS platforms paves the way toward high-performance, low-cost, broadband sensing and imaging modalities.

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Section: D‐based Photodetectorsmentioning

confidence: 99%

Recent Progress and Future Prospects of 2D‐Based Photodetectors

2018

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“…2D materials with ultrasmooth surfaces and atomic thicknesses are considered a sought‐after choice for interface charge trapping. The literature reports the integration of graphene and transition metal dichalcogenides with quantum dots (QDs) [ 10,21–24 ] and organic molecules/polymers [ 25–28 ] for photogating‐based photodetectors. For instance, a PbS/graphene hybrid field‐effect transistor (FET) reported a photoresponsivity of up to 10 5 A W −1 at 1.45 µm.…”

Section: Figurementioning

confidence: 99%

Ultralow‐Transition‐Energy Organic Complex on Graphene for High‐Performance Shortwave Infrared Photodetection

et al. 2020

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Room‐temperature, high‐sensitivity, and broadband photodetection up to the shortwave infrared (SWIR) region is extremely significant for a wide variety of optoelectronic applications, including contamination identification, thermal imaging, night vision, agricultural inspection, and atmospheric remote sensing. Small‐bandgap semiconductor‐based SWIR photodetectors generally require deep cooling to suppress thermally generated charge carriers to achieve increased sensitivity. Meanwhile, the photogating effect can provide an alternative way to achieve superior photosensitivity without the need for cooling. The optical photogating effect originates from charge trapping of photoinduced carriers at defects or interfaces, resulting in an extremely high photogain (106 or higher). Here, a highly sensitive SWIR hybrid photodetector, fabricated by integrating an organic charge transfer complex on a graphene transistor, is reported. The organic charge transfer complex (tetrathiafulvalene–chloranil) has an exceptional low‐energy intermolecular electronic transition down to 0.5 eV, with the aim of achieving efficient SWIR absorption for wavelengths greater than 2 µm. The photogating effect at the organic complex and graphene interface enables an extremely high photogain and a high detectivity of ≈1013 Jones, along with a response time of 8 ms, at room temperature for a wavelength of 2 µm.

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“…In contrast to organic molecules deposited under vacuum via the PVT method, solution‐processed organic molecules such as polymers, dye molecules, and biomolecules have been studied to facilitate device scalability as well as to achieve desirable properties . For example, a phototransistor based on the graphene/P3HT/poly[[4,8‐bis[(2‐ethylhexyl)oxy]benzo[1,2‐ b :4,5‐b′]dithiophene‐2,6‐diyl][3‐fluoro‐2‐[(2‐ethylhexyl)carbonyl]thieno[3,4‐ b ]thiophenediyl]] (PTB7) heterostructure has been developed for achieving high photoresponsivity of 10 5 A W −1 .…”

Section: Electronic and Optoelectronic Applicationsmentioning

confidence: 99%

2D–Organic Hybrid Heterostructures for Optoelectronic Applications

et al. 2019

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The unique properties of hybrid heterostructures have motivated the integration of two or more different types of nanomaterials into a single optoelectronic device structure. Despite the promising features of organic semiconductors, such as their acceptable optoelectronic properties, availability of low-cost processes for their fabrication, and flexibility, further optimization of both material properties and device performances remains to be achieved. With the emergence of atomically thin 2D materials, they have been integrated with conventional organic semiconductors to form multidimensional heterostructures that overcome the present limitations and provide further opportunities in the field of optoelectronics. Herein, a comprehensive review of emerging 2D-organic heterostructures-from their synthesis and fabrication to their state-of-the-art optoelectronic applications-is presented. Future challenges and opportunities associated with these heterostructures are highlighted.solution-processed on any substrate inexpensively and at relatively low temperatures, which is highly advantageous for their scale-up from fundamental studies to industrial-level production. [6][7][8][9][10] Initial examples of developed organic semiconductors include field-effect transistors (FETs), [4,5,[11][12][13][14][15] photodetectors (PDs), [5,16,17] photovoltaics (PVs), [5,16,18,19] light-emitting diodes (LEDs), [5,16,20] and so on. In spite of the demonstration of promising prototypes of organic semiconductors, their development and optimization for highperformance device applications remain a challenge. In particular, it is becoming increasingly difficult to impart suitable properties to individual materials and realize appropriate physical dimensions in order to satisfy increasing demands of multifunctionality for fundamental studies, device designs, and performance optimization. [21,22] Consequently, such challenges and opportunities can be addressed by performing multidimensional integration or hybridization of organic semiconductors with various types of materials having potentially novel functionalities and unique properties.2D van der Waals (vdW) materials are the most obvious candidate for such hybridization with organic semiconductors. [22,23] Since the discovery of graphene, which opened up new avenues ranging from fundamental studies to real-world applications, [24][25][26][27] several other groups of 2D vdW materials have also been discovered, such as hexagonal boron nitride (h-BN), [28,29] transition metal dichalcogenides (TMDCs), [23,[30][31][32][33][34] black phosphorus (BP), [35][36][37][38][39][40] borophene, [41][42][43] silicene, [43] and germanene. [43] The 2D structure has been demonstrated to possess several exceptional electrical, optical, mechanical, and thermal properties vis-à-vis its corresponding bulk counterpart. [22,25,27] Most importantly, from the viewpoint of hybridization with organic semiconductors, the atomically flat and dangling-bond-free surface of 2D vdW materials not only provides an ideal int...

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Hybrid structures of organic dye and graphene for ultrahigh gain photodetectors

Cited by 70 publications

References 37 publications

Recent Progress and Future Prospects of 2D‐Based Photodetectors

Recent Progress and Future Prospects of 2D‐Based Photodetectors

Ultralow‐Transition‐Energy Organic Complex on Graphene for High‐Performance Shortwave Infrared Photodetection

2D–Organic Hybrid Heterostructures for Optoelectronic Applications

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