Enhanced Light Scattering and Trapping Effect of Ag Nanowire Mesh Electrode for High Efficient Flexible Organic Solar Cell

Wang, Byung Yong; Yoo, Tae Hee; Lim, Jae-Hwan; Sang, Byoung In; Lim, Dae Soon; Choi, Won Kook; Hwang, Do Kyung; Oh, Young−Jei

doi:10.1002/smll.201402161

Cited by 83 publications

(53 citation statements)

References 39 publications

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“…13,25,26 Commercially available rGO and multi-walled CNT solutions were purchased. rGO, CNTs and AgNWs were deposited on polyethylene terephthalate (PET) substrates by spraying.…”

Section: Materials and Methods Materialsmentioning

confidence: 99%

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A highly flexible transparent conductive electrode based on nanomaterials

2017

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The electrical, optical, thermal, chemical, mechanical and tribological characteristics of a highly flexible transparent conductive electrode (HFTCE) coating based on reduced graphene oxide (rGO), carbon nanotubes (CNTs) and silver nanowires (AgNWs) were investigated under various conditions. The motivation was to develop a highly durable and flexible film for transparent conductive electrode applications. The overall characteristics of multilayers based on rGO, CNTs and AgNWs were found to be much better than those of the single-layer AgNW coating. The rGO and CNT layers served to protect the AgNW layer from damage due to bending and contact sliding motions. The contact pressure and bending stress were effectively distributed by the CNT layer deposited on top of the AgNW layer due to its spring-like behavior. In addition, the shear force from the friction force was reduced by the rGO top layer, which acted as a solid lubricant. Furthermore, the excellent performance of an HFTCE heater based on the rGO/CNT/AgNW coating was demonstrated by the results of a defrosting test. NPG Asia Materials (2017) 9, e438; doi:10.1038/am.2017.177; published online 13 October 2017 INTRODUCTIONIn recent decades, various transparent conductive films electrodes have been widely used in electronic devices such as solar cells, displays, memories and batteries. 1 In particular, indium tin oxide (ITO) has attracted considerable attention as a transparent conductive electrode because of its excellent optical and electrical properties. 2 However, indium, which is the main raw material used in ITO, has some disadvantages in terms of production and cost. Moreover, ITO application in flexible devices is limited by its brittleness. 3 To replace ITO in flexible devices, several types of conductive polymers, such as poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) and poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl-C61-butyric acid methyl ester have been suggested. 4,5 However, the electrical efficiency of these conductive polymers is much lower than that of ITO. Moreover, the mechanical properties of these conductive polymers are very weak despite their flexibility. Therefore, it is necessary to combine these conductive polymers with other electrodes to improve efficiency.Many studies using other types of conductive materials, such as graphene and carbon nanotubes (CNTs), have been conducted. [6][7][8][9][10][11][12] While carbon-based nanosheets and nanowires are known as materials with excellent mechanical and electrical properties, the sheet resistance of the coatings based on carbon is higher. Li et al. 6 demonstrated that the number of graphene layers deposited on the surface had a significant effect on their conductivity and transmittance. They found

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“…13,25,26 Commercially available rGO and multi-walled CNT solutions were purchased. rGO, CNTs and AgNWs were deposited on polyethylene terephthalate (PET) substrates by spraying.…”

Section: Materials and Methods Materialsmentioning

confidence: 99%

“…13 Wang et al 13 proved the superiority of AgNWs as electrodes based on properties such as conductivity, transmittance and flexibility. However, the AgNWs deposited on the substrate had a relatively low adhesion force due to the effects of weak van der Waals force and limited contact area between the AgNWs and the substrate.…”

Section: Introductionmentioning

confidence: 99%

A highly flexible transparent conductive electrode based on nanomaterials

2017

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“…To further enhance the light extraction or light trapping in the devices, nanostructures or nanoparticles are introduced into these TFC electrodes for improving the device performances [47,[130][131][132][133][134][135][136][137][138][139][140]. Besides these thin-film electrodes, fiber-/mesh-shaped electrodes also demonstrated good flexibility [17,51,64,67,68].…”

Section: Design Of Flexible Electrodesmentioning

confidence: 99%

“…Therefore, to reduce the bending strain at extreme bending states (corresponding to a very small R b ), ultra-thin substrate [60,96,97,123,124,139,[142][143][144][145][146][147][148] or even substrate-free configurations [149][150][151] which reduce the total thickness of the devices and achieve ultraflexibility or extreme conformability, are generally employed.…”

Section: Fabrication Of Ultraflexible Devicesmentioning

confidence: 99%

“…With TFC electrodes, flexible OSCs can be ob-tained by fabricating the devices on plastic substrates. Introducing nanostructures or nanoscattered particles into the devices may further enhance the light scattering and/or light trapping, and eventually improve the OSC efficiencies [136][137][138][139][140]. Based on the printed single wall carbon nanotube (SWCNT) film electrode on 125 μm-thick PET substrate with a T 550 of 85% and a R s of 200 Ω/sq, Rowell et al [101] fabricated efficient, flexible polymer-fullerene bulkheterojunction solar cells with comparable PCE~2.5% with the ITO/glass-based counterparts (PCE = 3%).…”

Section: Ultraflexible Organic Solar Cellsmentioning

confidence: 99%

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Thin-film organic semiconductor devices: from flexibility to ultraflexibility

Qian

Zhang

et al. 2016

Sci. China Mater.

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Flexible thin-film organic semiconductor devices have received wide attention due to favorable properties such as light-weight, flexibility, reproducible semiconductor resources, easy tuning of functional properties via molecular tailoring, and low cost large-area solution-procession. Among them, ultraflexible electronics, usually with minimum bending radius of less than 1 mm, are essential for the development of epidermal and bio-implanted electronics, wearable electronics, collapsible and portable electronics, three dimensional (3D) surface compliable electronics, and bionics. This review firstly gives a brief introduction of development from flexible to ultraflexible organic semiconductor electronics, and design of ultraflexible devices, then summarizes the recent advances in ultraflexible thin-film organic semiconductor devices, focusing on organic field effect transistors, organic light-emitting diodes, organic solar cells and organic memory devices.

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A Transparent, Smooth, Thermally Robust, Conductive Polyimide for Flexible Electronics

Spechler

Koh

Herb

et al. 2015

Adv Funct Materials

155

116

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In this work, a thermally and mechanically robust, smooth transparent conductor composed of silver nanowires embedded in a colorless polyimide substrate is introduced. The polyimide is exceptionally chemically, mechanically, and thermally stable. While silver nanowire networks tend not to be thermally stable to high temperatures, the addition of a titania coating on the nanowires dramatically increases their thermal stability. This allows for the polyimide to be thermally imidized at 360 °C with the silver nanowires in place, creating a smooth (<1 nm root mean square roughness), conductive surface. These transparent conducting substrate‐cum‐electrodes exhibit a conductivity ratio figure of merit of 272, significantly outperforming commercially available indium‐tin‐oxide (ITO)‐coated plastics. The conductive polymide is subjected to various mechanical tests and is used as a substrate for a thermally deposited, flexible, organic light‐emitting diode, which shows improved device performance compared to a control device made on ITO coated glass.

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Enhanced Light Scattering and Trapping Effect of Ag Nanowire Mesh Electrode for High Efficient Flexible Organic Solar Cell

Cited by 83 publications

References 39 publications

A highly flexible transparent conductive electrode based on nanomaterials

A highly flexible transparent conductive electrode based on nanomaterials

Thin-film organic semiconductor devices: from flexibility to ultraflexibility

A Transparent, Smooth, Thermally Robust, Conductive Polyimide for Flexible Electronics

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