Direct writing of silver nanowire electrodes via dragging mode electrohydrodynamic jet printing for organic thin film transistors

Li, Xinlin; Lee, Gyu Sung; Kong, Hoyoul; An, Tae Kyu; Kim, Se Hyun

doi:10.1016/j.orgel.2018.07.027

Cited by 36 publications

(33 citation statements)

References 42 publications

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“…Just in this sense, there is no technical difference between the use of (1), with (3), as it was proposed in Ref. [36], or with (10), as used in this work, or even with (9), in case (9) would be preferred over (10). The number of parameters to be extracted would be the only difference.…”

Section: Determination Of the Voltage Drop At The Contactmentioning

confidence: 79%

“…In order to validate the versatility of the standard contact model (10), it is tested with transistors with Schottky-limited contacts (0 < m k < 1), space-charge-limited contacts (1 ≤ m k ≤ 2), and even in transistors that when exposed to chemical treatments, have their contact region altered in such a way that any of the previous cases can be detected (0 < m k ≤ 2). In these situations, the OTFT model (1) and (10), in combination with the evolutionary procedure [36], can be seen as an effective diagnostic tool.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the objectives of the present work are to check the validity of this extended model (10) and to analyze the advantages of this unified model over the existing ones. The first advantage is that a single expression unifies the different mechanisms related to the injection and transport through the contacts of OTFTs.…”

Section: Semi-empirical Standard Contact Modelmentioning

confidence: 99%

“…The first advantage is that a single expression unifies the different mechanisms related to the injection and transport through the contacts of OTFTs. The second advantage lies behind the parameter extraction procedure that runs parallel to the compact OTFT model (1) and (10), which is introduced in the next section.…”

Section: Semi-empirical Standard Contact Modelmentioning

confidence: 99%

“…Organic thin-film transistors (OTFTs) are among the most popular technologies for lightweight, low-cost, flexible, and stretchable electronics [1][2][3][4]. Recently, significant advances were made in improving their important limitations such as a poor mobility [5][6][7][8], high process variability [9] or nonflexible electrodes [10]. Nevertheless, even these state-of-theart OTFTs are often limited by their contact regions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Versatile model for the contact region of organic thin-film transistors

Romero

González

Deen

et al. 2020

Organic Electronics

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Contact effects in organic thin film transistors (OTFTs) remain an important problem to be solved in these devices. Therefore, the correct physio-chemical modeling of the contact regions in OTFTs is necessary. In this work, a standard model for the contact region of OTFTs is proposed. It is a versatile model that describes the current-voltage characteristics of different kinds of contacts. It reproduces the behavior of Schottky barrier or space-charge limited contacts. It is a simple unified model since only a single parameter is necessary in order to distinguish between both kinds of contacts. The model is easily integrated in a generic compact model for the current-voltage characteristics of OTFTs. The resulting compact model, used in combination with an evolutionary parameter extraction procedure, allows to extract the intrinsic parameters and the current-voltage curves at the contact of single short-channel transistors. There is no need to use transistors with multiple channel lengths to accurately characterize the contact region or the active channel of the transistor. The model is tested with published experimental data of OTFTs with Schottky barrier or space-charge limited contacts. Finally, the method has been used as a diagnostic tool to analyze how an ammonia sensor reacts to different concentrations of the ammonia gas. Interestingly, alterations in the contact region have been detected when the gas concentration varies, transforming the space-charge limited contact of a pristine OTFT into a Schottky barrier contact under the exposure of gas.

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Section: Determination Of the Voltage Drop At The Contactmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Semi-empirical Standard Contact Modelmentioning

confidence: 99%

Section: Semi-empirical Standard Contact Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Versatile model for the contact region of organic thin-film transistors

Romero

González

Deen

et al. 2020

Organic Electronics

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Printing Conductive Nanomaterials for Flexible and Stretchable Electronics: A Review of Materials, Processes, and Applications

Huang

Zhu

2019

Adv Materials Technologies

358

347

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PE has been explored for the manufacturing of flexible and stretchable electronic devices by printing functional inks containing soluble or dispersed materials, [14][15][16] which has enabled a wide variety of applications, such as transparent conductive films (TCFs), flexible energy harvesting and storage, thin film transistors (TFTs), electroluminescent devices, and wearable sensors. [17][18][19][20][21][22][23][24] The global PE market should reach $26.6 billion by 2022 from $14.0 billion in 2017 at a compound annual growth rate of 13.6%. [25] PE devices are manufactured by a variety of printing technologies. Typical printing technologies can be divided into two broad categories: noncontact patterning (or nozzle-based patterning) and contact-based patterning. The noncontact techniques include inkjet printing, electrohydrodynamic (EHD) printing, aerosol jet printing, and slot die coating, while screen printing, gravure printing, and flexographic printing are examples of the contact techniques. Each of these techniques has its own advantages and disadvantages, but they all rely on the principle of transferring inks to a substrate. Understanding the characteristics and recent advances of each printing technique is important to further the progress in PE. Moreover, to promote the lab-scale printing technologies to large-scale production process, roll-toroll (R2R) printing, which is one of the manufacturing methods to obtain large-area films with low cost and excellent durability, has drawn much attention from both industry and the research community.Nearly all of devices based on PE require conductive structures, interconnects, and contacts; therefore, highly conductive patterns, usually with high transparency and/or high resolution, fabricated by means of printing conductive materials are one of the most critical components in PE devices. Various printable conductive nanomaterials, such as metal nanomaterials (e.g., metal nanoparticles and metal nanowires) and carbon nanomaterials (e.g., graphene and carbon nanotubes (CNTs)), have been explored and used as major materials for PE. Applying printing technology to deposition of the conductive nanomaterials requires formulation of suitable inks. After depositing inks on different substrates, post-printing treatment, Printed electronics is attracting a great deal of attention in both research and commercialization as it enables fabrication of large-scale, low-cost electronic devices on a variety of substrates. Printed electronics plays a critical role infacilitating widespread flexible electronics and more recently stretchable electronics. Conductive nanomaterials, such as metal nanoparticles and nanowires, carbon nanotubes, and graphene, are promising building blocks for printed electronics. Nanomaterial-based printing technologies, formulation of printable inks, post-printing treatment, and integration of functional devices have progressed substantially in the recent years. This review summarizes basic principles and recent development of common printing technologie...

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Direct Fabrication of VIA Interconnects by Electrohydrodynamic Printing for Multi‐Layer 3D Flexible and Stretchable Electronics

Ren

Dong

2021

Adv Materials Technologies

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Multi‐layer electrical interconnects are critical for the development of integrated soft wearable electronic systems, in which functional devices from different layers need to be connected together by vertical interconnects. In this work, electrohydrodynamic (EHD) printing technology is studied to achieve multi‐layer flexible and stretchable electronics by direct printing vertical interconnects as vertical interconnect accesses (VIAs) using a low‐melting‐point metal alloy. The EHD printed metallic vertical interconnection represents a promising way for the direct fabrication of multilayer integrated electronics with metallic conductivity and excellent flexibility and stretchability. By controlling the printing conditions, vertical interconnects that can bridge different heights can be fabricated. To achieve reliable VIA connections under bending and stretching conditions, an epoxy protective structure is printed around the VIA interconnects to form a core‐shell structure. A stable electrical response is achieved under hundreds of bending cycles and during stretching/releasing cycles in a large range of tensile strain (0–40%) for the printed conductors with VIA interconnects. A few multi‐layer devices, including a multiple layer heater, and a pressure‐based touch panel are fabricated to demonstrate the capability of the EHD printing for the direct fabrication of vertical metallic VIA interconnects for flexible and stretchable devices.

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Direct writing of silver nanowire electrodes via dragging mode electrohydrodynamic jet printing for organic thin film transistors

Cited by 36 publications

References 42 publications

Versatile model for the contact region of organic thin-film transistors

Versatile model for the contact region of organic thin-film transistors

Printing Conductive Nanomaterials for Flexible and Stretchable Electronics: A Review of Materials, Processes, and Applications

Direct Fabrication of VIA Interconnects by Electrohydrodynamic Printing for Multi‐Layer 3D Flexible and Stretchable Electronics

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