Relation between secondary doping and phase separation in PEDOT:PSS films

Donoval, Martin; Micjan, Michal; Novota, Miroslav; Nevrela, Juraj; Kováčová, Soňa; Pavúk, Milan; Juhász, P.; Jagelka, Martin; Kováč, J.; Jakabovič, J.; Cigáň, Marek; Weis, Martin

doi:10.1016/j.apsusc.2016.05.076

Cited by 39 publications

(31 citation statements)

References 28 publications

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“…AFM images of random spots along individual channels in a typical device are shown in Figure S2b, Supporting Information. The images are readily interpretable as presence of a number of crystalline domains with different orientations (along the source electrode to drain) and well‐defined boundaries that extend up to tens of microns which is largely in agreement with the literature . Importance of good connectivity between domains and well‐aligned crystallography across transistor channels has been previously highlighted as these features have been shown to greatly influence charge mobility and performance as well as device‐to‐device variability due to presence of deep charge traps in the boundaries .…”

Section: Resultssupporting

confidence: 82%

“…Electron. [35][36][37] Importance of good connectivity between domains and wellaligned crystallography across transistor channels has been previously highlighted as these features have been shown to greatly influence charge mobility and performance as well as device-to-device variability due to presence of deep charge traps in the boundaries. 2020, 6, 1901207 The electrical characteristics of individual device channels are demonstrated in Figure S2a, Supporting Information, showing variations in V th , µ, and SS for adjacent channels in a single device.…”

Section: Wwwadvelectronicmatdementioning

confidence: 99%

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Printed Flexible Organic Transistors with Tunable Aspect Ratios

Sadeghi

Delparastan

Pierre

et al. 2019

Adv Elect Materials

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film transistor show device performance reaching that of amorphous Si and solution-processed metal oxides. This high performance makes SOCs p-type OTFTs a strong candidate for several future complementary metal-oxide semiconductor applications. [13][14][15] Modulation of scale ratio of devices in a large array is one of the important parameters that governs circuit design. While most printing techniques can provide faster fabrication processes, the rapid on-demand modulation of W/L scale ratio in large array of devices remains as a challenge and a topic to investigate; especially for the myriad of specified circuit designs and application requirements. For instance, the tuning of the gain in each stage of an amplifier [16][17][18] or logic circuits [5] requires the modulation of OTFT W/L ratio. These configuration changes can be challenging, costly, and time consuming for common electrode printing techniques, such as screen printing and gravure printing. [19][20][21][22] These conventional mask-based approaches utilize a fixed pattern transfer that requires a full re-design for every new device structure. [21,23,24] Inkjet printing on the other hand is a nonimpact digital prototyping method that provides instant change of patterns. [25,26] This elimination of mask can reduce the processing costs especially for larger-scale production. [27] However, throughput of inkjet printing can become a limiting factor, especially when depositing over large area. [28] Interdigitated source and drain structure have been used in previous reports as a method to modify W/L ratio for a specific circuit design. [17,[29][30][31] The channel width (W) is modulated by changing the finger count. Meanwhile, channel length (L) is the smallest space between source and drain electrodes, and the resolution is associated to the printing technique. Low switching speed is one of the drawbacks of printed OTFTs compared to conventional Si technology, which can result from a number of factors such as mobility, dielectric layer thickness, and channel length. Achieving channel lengths smaller than 10 µm while maintaining high device yield is very challenging with printing techniques, especially for low-viscosity inks. The solution found to overcome this challenge is to utilize a combination of patterning techniques including the combination of conventional photolithography and direct-write printing techniques. [32] In parallel, there has been an interest to develop methods to decrease the source and drain electrode geometry and channel length using many printing methods. Interdigitated source and drain (SD) electrodes are typically used in electronics to increase channel width while maintaining small channel lengths, resulting in higher W/L ratios. There are few reports on printed interdigitated A fabrication technique that allows aspect ratio modulation in a large array of organic thin film transistors (OTFTs) is demonstrated. In this design, discrete interdigitated source and drain electrodes can be individually selected to create a range of aspe...

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Section: Resultssupporting

confidence: 82%

Section: Wwwadvelectronicmatdementioning

confidence: 99%

Printed Flexible Organic Transistors with Tunable Aspect Ratios

Sadeghi

Delparastan

Pierre

et al. 2019

Adv Elect Materials

View full text Add to dashboard Cite

show abstract

“…Most pronounced is the lamellar stacking direction, referenced as the (h00) plane. Depending on degree of long range order derived from processing approaches or the inclusion of poly-ionic dopants, [88][89][90][91][92][93][94] PEDOT films can exhibit between one and four lamellar scattering peaks along the (h00) plane. 88 The critical direction for electrical conductivity is the π-π stacking direction oriented perpendicular to the lamellar stacking direction.…”

Section: Microstructure Control and Characterizationmentioning

confidence: 99%

Microstructure-dependent electrochemical properties of chemical-vapor deposited poly(3,4-ethylenedioxythiophene) (PEDOT) films

et al. 2019

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“…Beyond the peculiarity associated to the deposition techniques, auxiliary components are added to impart specific features to the resulting CPC film. For example, secondary dopants enhance the conductivity by acting on the microstructure of the polymer [ 54 ], while plasticizers [ 55 ] increase the flexibility of the film and improve the resiliency of electrical features after deformation. In the coating/dyeing, the textile is immersed/dipped in the CP suspension/solution; consequently, the conductive film is deposited all over the surface.…”

Section: Fabrication Of Conductive Textile Based On Conductive Polmentioning

confidence: 99%

Textile Chemical Sensors Based on Conductive Polymers for the Analysis of Sweat

et al. 2021

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Wearable textile chemical sensors are promising devices due to the potential applications in medicine, sports activities and occupational safety and health. Reaching the maturity required for commercialization is a technology challenge that mainly involves material science because these sensors should be adapted to flexible and light-weight substrates to preserve the comfort of the wearer. Conductive polymers (CPs) are a fascinating solution to meet this demand, as they exhibit the mechanical properties of polymers, with an electrical conductivity typical of semiconductors. Moreover, their biocompatibility makes them promising candidates for effectively interfacing the human body. In particular, sweat analysis is very attractive to wearable technologies as perspiration is a naturally occurring process and sweat can be sampled non-invasively and continuously over time. This review discusses the role of CPs in the development of textile electrochemical sensors specifically designed for real-time sweat monitoring and the main challenges related to this topic.

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Relation between secondary doping and phase separation in PEDOT:PSS films

Cited by 39 publications

References 28 publications

Printed Flexible Organic Transistors with Tunable Aspect Ratios

Printed Flexible Organic Transistors with Tunable Aspect Ratios

Microstructure-dependent electrochemical properties of chemical-vapor deposited poly(3,4-ethylenedioxythiophene) (PEDOT) films

Textile Chemical Sensors Based on Conductive Polymers for the Analysis of Sweat

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