Stretchable and transparent nanofiber-networked electrodes based on nanocomposites of polyurethane/reduced graphene oxide/silver nanoparticles with high dispersion and fused junctions

Choi, Young-In; Hwang, Byeong‐Ung; Meeseepong, Montri; Hanif, Adeela; Ramasundaram, Subramaniyan; Trung, Tran Quang; Lee, Nae‐Eung

doi:10.1039/c8nr10170a

Cited by 24 publications

(23 citation statements)

References 28 publications

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“…To fabricate TSCs, the stretchability and optical properties of a polymer are combined with the enhanced mechanical and electrical properties of conductive nanomaterials. The performance of these electrodes depends on the materials used, particularly the conductive nanomaterial which has electrical and mechanical properties that are highly dependent on the quality, size, aspect ratio, specific surface area, volume fraction used, and the compatibility and dispersion of the conductive nanomaterial in the polymer matrix 33…”

Section: Materials For Tscs Based On Nanomaterialsmentioning

confidence: 99%

“…Mixing several kinds of nanomaterials has also been explored in order to improve dispersion. Choi et al fabricated TSCs by electrospinning of RGO/AgNPs/PU composites on PDMS substrates 33. The negative charge of AgNPs allows GO to be dispersed well in PU solution.…”

Section: Materials For Tscs Based On Nanomaterialsmentioning

confidence: 99%

“…Due to the limitations of layered nanocomposites, studies are focusing on uniformly dispersed nanocomposites16,19 even though, as noted earlier, uniformly dispersed nanocomposites with good electrical and optical qualities are difficult to obtain. Uniformly dispersed RGO/AgNP/PU nanocomposites were used for fabricating TSCs, but this composite was electrospun in a layered structure 33…”

Section: Fabrication Techniquementioning

confidence: 99%

“…A web‐like structure of networks of the deposited fiber produces stretchability and transparency. Electrospun polymer fibers can be conductive themselves by adding conductive nanomaterials to the polymer solution 33. Besides, An et al deposited metal on electrospun nanofiber networks to endow the polymer networks with conductivity 74.…”

Section: Fabrication Techniquementioning

confidence: 99%

See 3 more Smart Citations

Recent Progress in Transparent Conductors Based on Nanomaterials: Advancements and Challenges

McLellan

Yoon

Leung

et al. 2020

Adv Materials Technologies

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Transparent conductors are essential to the fabrication of transparent electronics such as touch panels and displays, making them crucial elements in the current electronics industry. With the rapid surge of interest in stretchable electronics, transparent conductors now are also required to be stretchable. Therefore, new approaches to developing transparent and stretchable conductors (TSCs) are needed to replace conventional rigid transparent conductors. Constructing nanocomposites of various nanomaterials and substrates is one of the most promising approaches to developing TSCs due to the nanomaterials' geometrical, mechanical, electrical, and optical properties. Herein, the progress of carbon‐ and metal‐based nanomaterials and conductive polymers composites are investigated and categorization of TSCs based on types of nanomaterials and fabrication techniques are discussed. Lastly, a review of the demonstrated state‐of‐the‐art applications of TSCs and a perspective about the future of TSCs based on nanomaterials are provided.

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Section: Materials For Tscs Based On Nanomaterialsmentioning

confidence: 99%

Section: Materials For Tscs Based On Nanomaterialsmentioning

confidence: 99%

Section: Fabrication Techniquementioning

confidence: 99%

Section: Fabrication Techniquementioning

confidence: 99%

See 2 more Smart Citations

Recent Progress in Transparent Conductors Based on Nanomaterials: Advancements and Challenges

McLellan

Yoon

Leung

et al. 2020

Adv Materials Technologies

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show abstract

“…Stretchable dielectrics require excellent mechanical properties and high dielectric constant. However, elastomers exhibit very low permittivity and excellent stretchable properties, such as polyurethane (PU) [14], poly-Styrene-co-Ethylene-co-Butylene-co-Styrene (SEBS) [15] and dicarboxy-terminated poly(acrylonitrileco-butadiene) with cross-linking 1,6-bis(trichlorosilyl)hexane [16]. One effective method to improve dielectric properties is to compound nanomaterials into elastomers.…”

Section: Introductionmentioning

confidence: 99%

Stretchable multifunctional dielectric nanocomposites based on polydimethylsiloxane mixed with metal nanoparticles

Feng

Zhong

Zhao

2019

Mater. Res. Express

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Next generation wearable electronics require stretchable dielectrics. There has been significant effort to characterize and improve the components of dielectric composites for use in these devices. In this work, a new stretchable dielectric material, composited by silver nanoparticles (Ag NPs), nickel nanoparticles (Ni NPs), and polydimethylsiloxane (PDMS), is prepared and characterized. The alternating arrays of Ag NPs groups and Ni NPs groups in the three-dimensional matrix of PDMS function as micro capacitors and prevent current percolation. Compared with PDMS alone, the alternating arrays exhibit a dielectric constant (k) that is increased by 1146% and can reach 35.13, with dielectric loss as low as 0.009. Slightly lower k and larger dielectric loss appear at high frequencies. The material exhibits negative temperature dependence, and the composition ratio affects the dielectric properties. The strain at break is 139.68% and the elastic modulus is as low as 3.57 kPa. By controlling the type, size and dispersion of metal nanoparticles in PDMS matrix, a parallel-plate capacitor with constant capacitance is achieved, demonstrating the dependence of the dielectric constant on the applied strain. Moreover, by replacing the parallel plates with cylindrical fibers, a capacitive strain sensor was demonstrated. After hundreds of stretching-releasing cycles, the dielectrics work normally. The excellent properties of this material suggest its significant potential for use in wearable electronics.

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Highly Efficient (>10%) Flexible Organic Solar Cells on PEDOT‐Free and ITO‐Free Transparent Electrodes

Seo

Lee

et al. 2019

Advanced Materials

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We present a novel approach to fabricate flexible organic solar cells without indium tin oxide (ITO) and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). We use junctionfree metal nanonetworks (NNs) as transparent electrodes. The metal NNs are monolithically etched using nanoscale shadow masks, and they exhibit excellent optoelectronic performance. Furthermore, the optoelectrical properties of the NNs can be controlled by both the initial metal layer thickness and NN density. Hence, with an extremely thin silver layer, the appropriate density control of the networks can lead to high transmittance and low sheet resistance. Such NNs can be utilized for thin film devices without planarization by conductive materials such as PEDOT:PSS. As a result, we successfully fabricate a highly efficient flexible organic solar cell with a power conversion efficiency (PCE) of 10.6% and high device yield (93.8%) on PEDOT-free and ITO-free transparent electrodes. Furthermore, the flexible solar cell retains 94.3% of the initial PCE even after 3000 bending stress tests (strain: 3.13%).

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Stretchable and transparent nanofiber-networked electrodes based on nanocomposites of polyurethane/reduced graphene oxide/silver nanoparticles with high dispersion and fused junctions

Abstract: Stretchable and transparent nanofiber-networked electrode.

Cited by 24 publications

References 28 publications

Recent Progress in Transparent Conductors Based on Nanomaterials: Advancements and Challenges

Recent Progress in Transparent Conductors Based on Nanomaterials: Advancements and Challenges

Stretchable multifunctional dielectric nanocomposites based on polydimethylsiloxane mixed with metal nanoparticles

Highly Efficient (>10%) Flexible Organic Solar Cells on PEDOT‐Free and ITO‐Free Transparent Electrodes

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