Transparent and conductive multi walled carbon nanotubes flexible electrodes for optoelectronic applications

Aloui, Walid; Ltaief, A.; Bouazizi, Abdelaziz

doi:10.1016/j.spmi.2013.10.027

Cited by 40 publications

(22 citation statements)

References 25 publications

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“…It is true that MWCNT and PEDOT:PSS based materials have been well explored for a wide range of applications. For instance, conductive MWCNT on PET substrate with sheet resistance of 180 Ω cm −2 and transparency of 81% at 550 nm has been employed as flexible electrode . Pakdee et al fabricated MWCNT film on flexible stainless steel using a home‐built CVD system .…”

Section: Resultsmentioning

confidence: 99%

“…For instance, conductive MWCNT on PET substrate with sheet resistance of 180 Ω cm À2 and transparency of 81% at 550 nm has been employed as flexible electrode. [61] Pakdee et al fabricated MWCNT film on flexible stainless steel using a home-built CVD system. [62] Conductive inkjet printed PEDOT:PSS/ MWCNT nano-composite with aligned carbon nanotubes by applied electric field with an electrical conductivity of 6.7 S cm À1 for 0.03 wt% of CNT has been reported.…”

Section: Resultsmentioning

confidence: 99%

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Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Jasna

Raman

Jayalekshmi

et al. 2018

Phys. Status Solidi A

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High‐performance flexible optoelectronic devices have great potential as active elements for flexible and wearable electronics. The authors report highly flexible conducting poly (3, 4‐ethylene dioxythiophene):polystyrene sulfonate/multiwalled carbon nanotubes (PEDOT:PSS/MWCNT) composite thin films synthesized by simple, cost effective rod‐coating technique. The effect of MWCNT on PEDOT:PSS matrix is analyzed by spin coating PEDOT:PSS/MWCNT composite on glass substrates with varying concentration (0–2 wt%) of MWCNT. Field emission scanning electron microscope (FE‐SEM) images confirm the uniform dispersion of MWCNT and formation of conducting path above 0.3 wt% of MWCNT. The conductivity of the spin coated films is increased from 1 Scm−1 to ≈20 Scm−1 on addition of 2 wt% of MWCNT. From UV‐Vis NIR spectra, the transparency of composite films in the visible range (at 550 nm) is found to decrease with respect to MWCNT loading. The PEDOT:PSS/MWCNT flexible electrode exhibit high electrical conductivity of 74 Scm−1 and high stability upon bending to a radius of curvature ≈9.6 mm. The features observed are an outcome of the interaction of MWCNT with PEDOT polymer as the back bone. These films are adhered to the substrate and the properties are stable upon bending the film for large number of cycles. To demonstrate the potential use of this composite film as an electrode, a thin film transistor is fabricated with PEDOT:PSS/MWCNT film as source and drain electrode. The device shows high field effect mobility of µsat = 1.16 cm2 V−1 s−1 with on/off ratio about 2.3 × 103. These favorable results make PEDOT:PSS/MWCNT conducting electrode as an excellent candidate for the next generation flexible electrodes realized by a facile solution process.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Jasna

Raman

Jayalekshmi

et al. 2018

Phys. Status Solidi A

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“…At the present time, there are different options to fabricate flexible conductive electrodes based on CNT, such as direct deposition using spin coating, spraying or incubation, and deposition by vacuum filtration, as well as different indirect methods, including bar coating, dip coating, and inkjet printing. However, these methods show a major common problem, that is, the weak adhesion between the substrates and CNT [5,[67][68][69][70][71].…”

Section: Carbon Nanotubesmentioning

confidence: 99%

“…MWCNT, which are known to show excellent characteristics such as large surface area, high conductivity, and good chemical stability due to their structural properties, have also been used to produce TCE using different manufacturing techniques. For example, Aloui et al [5] prepared flexible electrodes using PET as substrate. CNT were prepared in an ultrasonic bath using sodium dodecyl sulfate (SDS) aqueous solutions of carbon nanotubes.…”

Section: Mwcntmentioning

confidence: 99%

“…Nevertheless, it presents some major drawbacks, including high costs, scarcity of indium, and brittleness, making it impossible to adapt to future applications. Additionally, ITO presents a relatively high refraction index (∼2.0) that could produce unwanted reflections if it is used on a substrate with lower refraction index [4][5][6][7]. As a consequence, the development of alternative TCE materials that fulfill the main requirements of a high optical transparency and a proper sheet resistance is a priority [8].…”

Section: Introductionmentioning

confidence: 99%

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Transparent Electrodes: A Review of the Use of Carbon-Based Nanomaterials

L¹,

pez-Naranjo²,

Gonz

et al. 2016

Journal of Nanomaterials

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Transparent conducting electrodes (TCE) are extensively applied in a great range of optoelectronic and photovoltaic equipment (e.g., solar cells, touch panels, and flexible devices). Carbon-based nanomaterials are considered as suitable replacements to substitute traditional materials to manufacture TCE due to their remarkable characteristics, for example, high optical transmittance and outstanding electrical properties. In comparison with traditional indium tin oxide electrodes, carbon-based electrodes show good mechanical properties, chemical stability, and low cost. Nevertheless, major issues related to the development of good quality manufacture methods to produce carbon-based nanomaterials have to be overcome to meet massive market requirements. Hence, the development of alternative TCE materials as well as appropriate large production techniques that meet the requirements of a proper sheet resistance along with a high optical transparency is a priority. Therefore, in this work, we summarize and discuss novel production and synthesis methods, chemical treatments, and hybrid materials developed to satisfy the worldwide request for carbon-based nanomaterials.

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Engineering Silver Microgrids with a Boron Nitride Nanotube Interlayer for Highly Conductive and Flexible Transparent Heaters

Wagner

Kell

Martinez‐Rubi

et al. 2022

Adv Materials Technologies

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into next-generation organic electronics applications such as thin film transistors (TFTs), [1] organic photovoltaics (OPVs), [2][3][4] touch-sensitive interfaces, [5] and lightemitting diodes (LEDs). [6] Conventional metal oxide-derived conductive materials such as indium tin oxide (ITO) are still predominantly employed as TCEs due to their excellent electrical properties (R s = 10 Ω sq −1 ) and notable optical transparency (T = 90%). [7,8] Despite such favorable properties, the feasibility of ITO electrodes for mass production has recently come into question. High-cost sputtering deposition techniques combined with finite indium resources are key limitations towards scale-up potential, while its mechanical brittleness has made it a poor candidate for printable electronics. [9][10][11] Several viable flexible TCE alternative materials such as graphene, [12][13][14] carbon nanotubes, [12,[14][15][16] metallic nanowires, [17,18] metallic grids, [6,19,20] and hybrid films [21][22][23][24][25] have emerged to circumvent the challenges of ITO electrodes in device architectures. Silver metallic microgrids hold great potential as flexible TCEs due to their high degree of geometric tunability and versatility of available ink formulations compatible with high volume printing techniques such as screen-printing. [26,27] Ink formulations containing metal carboxylate salts, specifically silver neodecanoate (AgND), demonstrate a mechanically robust and highly conductive medium for fabricating silver features at low processing temperatures. [28][29][30] However, maximizing the electro-optical properties is key for TCE design to ensure that the payoff for high electrical performance does not negatively impact the resulting transparency of the electrode. Optimizing the electro-optical properties through careful selection of the TCE design, material selection and material processing conditions ensures that high conductive performance of the grids can be achieved with high optical transparency. One technique to improve the electro-optical properties of microgrid TCEs is to optimize the process that converts silver molecular ink into conductive and uniform metal traces. Photonic sintering in particular is an effective process to convert AgND into conductive Ag traces, with high line uniformity and density (increasing conductivity and reducing resistance). PhotonicThe use of flexible transparent conductive electrodes (TCEs) as printed heaters offers unique advantages where transparency is a necessary design feature. Many existing TCE materials however suffer from poor flexibility and require complex fabrication processes and thus are not commercially viable for such applications. The design and process optimization of screen-printable silver metal microgrids over a layer of boron nitride nanotubes (BNNT) to produce highly conductive and mechanically robust transparent heaters with high transparency and low power requirements is reported. Square and hexagonal geometries are investigated alongside varying line width and pitch combinat...

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Transparent and conductive multi walled carbon nanotubes flexible electrodes for optoelectronic applications

Cited by 40 publications

References 25 publications

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Transparent Electrodes: A Review of the Use of Carbon-Based Nanomaterials

Engineering Silver Microgrids with a Boron Nitride Nanotube Interlayer for Highly Conductive and Flexible Transparent Heaters

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