Recent progress in silver nanowire based flexible/wearable optoelectronics

Kwon, Jinhyeong; Suh, Yong-Suk; Lee, Sung Yong; Lee, Phillip; Han, Seungyong; Hong, Sukjoon; Yeo, Junyeob; Lee, Habeom; Ko, Seung Hwan

doi:10.1039/c8tc01024b

Cited by 132 publications

(141 citation statements)

References 118 publications

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“…[ 15–21 ] For the successful design of such electronic systems, highly conductive and transparent electrodes are essential, and these electrodes should retain their optoelectrical properties under strain‐induced deformation. Among several materials for STEs, [ 18,22–26 ] silver (Ag) nanowire (NW) is the most widely used for flexible transparent electrodes, due to its excellent optical and electrical properties; [ 27,28 ] thus, it is also recognized as a promising material in STEs. Although practical optoelectronic applications require large‐scale STEs, research on the scalable manufacturing process of STEs is rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Buckling Instability Control of 1D Nanowire Networks for a Large‐Area Stretchable and Transparent Electrode

Kim

Kwon

et al. 2020

Adv Funct Materials

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A commonly used strategy to impose deformability on conductive materials is the prestrain method, in which conductive materials are placed on prestretched elastic substrates and relaxed to create wavy or wrinkled structures. However, 1D metallic nanowire (NW) networks typically result in out-of-plane buckling defects and NW fractures, due to their rigid and brittle nature and nonuniform load transfer to specific points of NW. To resolve these problems, an alternative method is proposed to control the elastic modulus of 1D NW networks through contact with various solvents during compressive strain. Through solvent contact, the interface interactions between the NWs and between the NW and substrate can be controlled, and it is shown that the surface instability of the 1D random network is formed differently from a uniform bilayer film, which also can vary with the modulus of the network. For modulus values lower than the critical point, slippage and rearrangement of NW strands mainly occur and individual strands in the network show an in-plane wavy configuration, which is ideal for structural stretchability. Based on the solvent-assisted prestrain method, letter-sized, large-area stretchable, and transparent electrodes with high transparency and conductivity are achieved, and stretchable and transparent alternating current electroluminescent devices for stretchable display applications are also realized.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201910214.novel optoelectronic devices such as deformable touch screens, [3][4][5][6][7] electronic skins, [8][9][10][11] photovoltaics, [12][13][14] and foldable and stretchable displays. [15][16][17][18][19][20][21] For the successful design of such electronic systems, highly conductive and transparent electrodes are essential, and these electrodes should retain their optoelectrical properties under strain-induced deformation. Among several materials for STEs, [18,[22][23][24][25][26] silver (Ag) nanowire (NW) is the most widely used for flexible transparent electrodes, due to its excellent optical and electrical properties; [27,28] thus, it is also recognized as a promising material in STEs. Although practical optoelectronic applications require large-scale STEs, research on the scalable manufacturing process of STEs is rarely reported. Large-scale Ag NW-based electrodes are manufactured using a variety of scalable manufacturing processes, such as roll-toroll slot-die coating, [29,30] bar casting, [31,32] and spray coating; [33] however, most of the conventional large transparent electrodes (%T ≈ 90%) exhibit flexibility with polymeric substrates and no stretchability. This is because the yield strain of individual Ag NWs is only ≈1.5% in the stretching direction. [34] Structure-assisted stretchability, [35] a process that provides brittle materials with stretchability, can be an ideal approach to accommodate large applied strains without fracturing the materials. Many studies of stretchable electr...

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Section: Introductionmentioning

confidence: 99%

Buckling Instability Control of 1D Nanowire Networks for a Large‐Area Stretchable and Transparent Electrode

Kim

Kwon

et al. 2020

Adv Funct Materials

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“…Flexible wearable devices have gained considerable attention and experienced rapid growth in recent years [1][2][3][4][5][6][7][8]. Many efforts have been dedicated to integrate the attributes of low cost, lightweight, stability, small size, flexibility, and multi-functional sensitivity to the flexible sensor, which is an important branch of wearable devices [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Highly Stretchable TPU/Ag Nanowire Strain Sensor with Spring-Like Configuration

Pan

Wang

et al. 2020

Polymers

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Stretchable nano-fibers have attracted dramatic attention for the utility in wearable and flexible electronics. In the present case, Ag nanowires (AgNWs)-intertwined thermoplastic polyurethanes (TPU) unwoven nano-membrane is fabricated by an electrospinning method and dip coating technique. Then a strain sensor with a spring-like configuration is fabricated by a twisted method. The sensor exhibits superior electrical conductivity up to 3990 S·cm−1 due to the high weight percentage of the Ag nanowires. Additionally, thanks to the free-standing spring-like configuration that consists of uniform neat loops, the strain sensor can detect a superior strain up to 900% at the point the sensor ruptures. On the other hand, the configuration can mostly protect the AgNWs from falling off. Furthermore, major human motion detection, like movement of a human forefinger, and minor human motion detection, such as a wrist pulse, show the possible application of the sensor in the field of flexible electronics.

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“…Moreover the poor adhesion to the substrate of the carbon nanotube and the high surface roughness of their layers make it difficult to use these nanotubes as TCE [17]. On the other hand, replacing carbon nanotubes with metal nano-wires have shown great promise, due to the fact that it is easier to grow transparent and conductive metal nano-wires films [18,19]. Nevertheless problems of adhesion and surface roughness are still present.…”

Section: Introductionmentioning

confidence: 99%

Dielectric/Metal/Dielectric Flexible Transparent Electrodes, from Smart Window to Semi-transparent Solar Cells

Bernède¹,

Cattin²

2019

AJET

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The present manuscript is dedicated to In free transparent conductive andflexible heterostructure electrodes. The new electrodes correspond todielectric/metal/dielectic (D/M/D) multilayer structures deposited under vacuum. In thepresent work, after a fast review of the general properties of D/M/D electrodes using Ag asmetal, we then develop the study of D/Cu/D multilayer structures. We propose to substituteCu to Ag, because it is far cheaper. However, Cu having tendency to diffuse into manydielectrics it is difficult to obtain stable electrodes. We show that using Cu:alloys, i.e. Cu:Niand Cu:Al, as metal it is possible to decrease significantly the Cu ions diffusion and toincrease significantly the stability of the multilayer electrodes with Cu. Finally, we show thatwhen these electrodes are used as anode in organic photovoltaic cells, they can allowachieving efficiency similar to that obtained with ITO.

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Recent progress in silver nanowire based flexible/wearable optoelectronics

Abstract: A summary of the recent and potential future developments in silver nanowire based flexible/wearable optoelectronic applications is presented.

Cited by 132 publications

References 118 publications

Buckling Instability Control of 1D Nanowire Networks for a Large‐Area Stretchable and Transparent Electrode

Buckling Instability Control of 1D Nanowire Networks for a Large‐Area Stretchable and Transparent Electrode

Facile Preparation of Highly Stretchable TPU/Ag Nanowire Strain Sensor with Spring-Like Configuration

Dielectric/Metal/Dielectric Flexible Transparent Electrodes, from Smart Window to Semi-transparent Solar Cells

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