Investigation of the dimensionality of charge transport in organic field effect transistors

Abdalla, Hassan; Fabiano, Simone; Kemerink, Martijn

doi:10.1103/physrevb.95.085301

Cited by 14 publications

(12 citation statements)

References 18 publications

(43 reference statements)

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“…Controlling the nanoscale self-assembly of polymer materials is a key issue in various elds such as biomimetic materials [1][2][3][4][5] and exible electronics device science. [6][7][8][9][10] To achieve and improve control, both material synthesis and processing methodology have been developing synergistically, thereby providing molecular design and bottom-up approaches for the simple and precise control of nanostructures. The Langmuir-Blodgett (LB) technique is a notable example of nanoscale assembly using an air-water interface.…”

Section: Introductionmentioning

confidence: 99%

Amphiphilic acrylamide block copolymer: RAFT block copolymerization and monolayer behaviour

2017

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Section: Introductionmentioning

confidence: 99%

Amphiphilic acrylamide block copolymer: RAFT block copolymerization and monolayer behaviour

2017

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“…For example, for exciton transport in organic thin films, it is preferable to have a structure that is oriented normal to the π–π stacking direction to ensure optimized charge injection and/or extraction . Similarly, organic FETs (OFETs) are required to have a standing‐up molecular orientation, as opposed to the lying‐down orientation in organic LEDs (OLEDs) or organic PVs (OPVs) . In addition to the above‐described advantage, sequential deposition of different organic molecules allows more complex structures such as multicomponent or multidimensional 2D–organic heterostructures.…”

Section: Fabrication and Physical Properties Of 2d–organic Hybrid Strmentioning

confidence: 99%

“…Furthermore, organic semiconductors can be 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 . Initial examples of developed organic semiconductors include field‐effect transistors (FETs), photodetectors (PDs), photovoltaics (PVs), light‐emitting diodes (LEDs), and so on. In spite of the demonstration of promising prototypes of organic semiconductors, their development and optimization for high‐performance device applications remain a challenge.…”

Section: Introductionmentioning

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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“…Charge transport generally occurs at the semiconductor/dielectric interface. In recent years, extensive efforts have been devoted to explore the surface charge transport of organic semiconductors . On the one hand, in bulk crystal‐based FETs, several groups studied the surface carrier properties using air gap as gate insulator .…”

Section: Transistor Applications and Physics Of 2dmcsmentioning

confidence: 99%

“…A pioneering study indicated that sexithiophene FETs sustain the saturation current using the first two MLs. Whereas the film thicknesses of the saturation mobility for pentacene range from the monolayer to 5–6 molecular layers . Therefore, variations in film morphologies can result in dramatic differences in the effective film thicknesses for the saturation mobilities.…”

Section: Transistor Applications and Physics Of 2dmcsmentioning

confidence: 99%

Solution‐Processed 2D Molecular Crystals: Fabrication Techniques, Transistor Applications, and Physics

Qian

Jiang

et al. 2018

Adv Materials Technologies

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the complex microstructures and undesir able qualities of conventional organic bulk thin films can largely lead to severe performance bottlenecks in functional OFETs [23,24] and serve as essential chal lenges in unveiling the intrinsic electrical properties. [25] Therefore, a new organic material is profoundly required to satisfy the anticipated demand for fundamental studies and to sustain the revolutionary advancement in organic electronics.As an emerging electronic material, 2D molecular crystals (2DMCs) have attracted particular attention since their discovery. [26,27] The material structure of 2DMC features a monolayer (ML) or few layers of molecules that are assembled via weak van der Waals (vDW) bonding along two dimensions. 2DMCs have also dem onstrated unique characteristics of thick ness uniformity over a large scale, perfect lateral continuity with an atomically flat surface, and longrange molecular ordering. Particularly, when the available conforma tions of crystalline molecular semiconductors are restricted under a special constraint geometry, the interlayer screening that commonly exists in the 3D bulk organic semiconducting crystals can be effectively eliminated. [27,28] Thus, 2DMCs are extremely fascinating for the direct exploration of the charge accumulation and transport behaviors regarding the properties of the semiconductor/insulator interface, disorder effects, and polaronic relaxation. Especially, in 2DMCbased FETs, the inter facial interactions on the molecular crystals can be well con fined at 2D limit, exhibiting different influences from layer to layer. Thus, the microscopic behaviors of charge carriers can be much effectively modulated. Therefore, 2DMCs possess unique optoelectronic properties that cannot be achieved in conven tional bulk molecular crystals. [29][30][31] Besides, utilizing their ultrathin structural features and superior interface qualities can significantly contribute to the enhanced performance of 2DMC based functional FETs. These unique merits, combined with intrinsic properties, such as lightweight construction, material versatility, and chemical/environment stability, explicitly enable these 2D crystals fascinating prospects for realistic applications in advanced electronic technologies. [15,[32][33][34][35] Obtaining molecular crystals with 2D morphology is an essential prerequisite for scientific and technological studies. Pioneering efforts have been devoted to vaporgrown 2DMCs. [36][37][38][39][40][41][42] However, the expensive preparation cost and rigorous growth conditions have rendered these methods Based on intensive research, organic field-effect transistors (OFETs) will likely remain at the zenith in information science for many years due to their numerous potential applications in portable and smart electronic devices. Elucidating the intrinsic charge-transport behavior and realizing functional OFETs with superior device characteristics have been the cornerstones for the sustainable advancement in organic electronics. The emerging 2D molecular crystal...

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Investigation of the dimensionality of charge transport in organic field effect transistors

Cited by 14 publications

References 18 publications

Amphiphilic acrylamide block copolymer: RAFT block copolymerization and monolayer behaviour

Amphiphilic acrylamide block copolymer: RAFT block copolymerization and monolayer behaviour

2D–Organic Hybrid Heterostructures for Optoelectronic Applications

Solution‐Processed 2D Molecular Crystals: Fabrication Techniques, Transistor Applications, and Physics

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