Low-visibility patterning of transparent conductive silver-nanowire films

Cho, Eun−Hyoung; Hwang, Jiann Loung; Kim, Jae-Kwan; Lee, Jooho; Kwak, Chan; Lee, Chang Seung

doi:10.1364/oe.23.026095

Cited by 24 publications

(14 citation statements)

References 10 publications

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“…The surfactant elimination can be attributed to acetic acid in the chemical mixture solution which washes and etches the surfactant on Ag nanowire surface promoted by the enhanced electron density between PVP and Ag nanowires due to the charge transfer from PVP to Ag nanowires. [ 47–49 ] In order to clarify the effects of PVP removal by acetic acid, chemical treatments with ethanol liquid (used for the solvent of the one‐step chemical treatment), ascorbic acid solution of 1 × 10 −3 m in ethanol, and acetic acid liquid were carried out on Ag nanowires electrode. It was found that only the sheet resistance of Ag nanowires electrode treated by acetic acid has been decreased from 65 to 55 Ω sq −1 as shown in Table S1 (Supporting Information), which means that the surfactants on the Ag nanowires had been removed after the acetic acid treatment as verified by SEM images of Figure S2 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

High Performance Flexible Transparent Electrode via One‐Step Multifunctional Treatment for Ag Nanonetwork Composites Semi‐Embedded in Low‐Temperature‐Processed Substrate for Highly Performed Organic Photovoltaics

Kim

Ouyang

et al. 2020

Advanced Energy Materials

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For ideal flexible transparent electrodes, the features of good electrical/ optical properties, low surface roughness, efficient charge transportation, robust electrical stability under simultaneously continuous operation bias, and mechanical bending are critical. Herein, a flexible transparent electrode fulfilling all these features is demonstrated by silver (Ag) nanonetwork composites semi-embedded in low-temperature-processed colorless polyimide (cPI), which shows a figure of merit over 1000 (5.4 Ω sq −1 sheet resistance and >94% diffused transmission at 550 nm wavelength), extremely smooth topography (<1 nm root-mean-square roughness and <3 nm peak-to-valley roughness), remarkable bending stability under continuous operation bias, and increased work function favoring the band alignment with typical charge transport layers for efficient devices. These characteristics are attributed to one-step multifunctional chemical treatment on the composite of Ag nanowires and an example polymer of poly(3,4-ethylenedioxythiophene):polysty rene sulfonate (PEDOT:PSS). The strategic one-step process simultaneously offers selective welding at nanowires cross junctions to form an Ag nanonetwork, and removing polyvinylpyrrolidone surfactant from Ag nanowires and PSS from PEDOT:PSS. The flexible electrode also favors the residue-free cPI transfer for applications. Flexible organic solar cells (OSCs) made from the electrode achieve an averaged power conversion efficiency of 14.46% (best, 15.12%), which is the best flexible OSCs reported so far.

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Section: Resultsmentioning

confidence: 99%

High Performance Flexible Transparent Electrode via One‐Step Multifunctional Treatment for Ag Nanonetwork Composites Semi‐Embedded in Low‐Temperature‐Processed Substrate for Highly Performed Organic Photovoltaics

Kim

Ouyang

et al. 2020

Advanced Energy Materials

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“…Regarding the wet-etching pattern, the visibility problem can be alleviated by partial etching. The partially etched nonconductive region provides a small difference in transmittance between the conductive and nonconductive regions of the TCF patterns 18 . Additionally, in laser patterning, the laser disconnects the AgNW networks in selective areas, thus electrically insulating the irradiated areas.…”

mentioning

confidence: 99%

Patterned transparent electrode with a continuous distribution of silver nanowires produced by an etching-free patterning method

Shin

Park

Han

et al. 2017

Sci Rep

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The outstanding electrical, optical, and mechanical properties of silver nanowire transparent electrodes are attractive for use in many optoelectronic devices, and the recent developments related to these electrodes have led to their commercialization. To more fully utilize the advantages of this technology, developing new process technologies in addition to performance improvements is important. In this report, we propose a novel ultra-simple patterning technology to generate a silver nanowire transparent layer and a unique patterned structure with continuously distributed silver nanowires without any etched areas. The patterning is conducted by exposure to ultraviolet light and rinsing. The exposed and unexposed regions of the resulting layer have dramatically different electrical conductivities, which produces an electrical pathway without using any etching or lift-off processes. The unique patterned structure produced by this etching-free method creates hardly any optical difference between the two regions and results in excellent visibility of the patterned transparent electrode layer.

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“…Recently, transparent electrodes (TEs) such as graphene 8 , graphene-polymer composites 9 , carbon nanotubes (CNTs) 10 , metallic nanowires (MNWs) 11 and metallic mesh film (MMF) 4 , 7 have studied as alternates to ITO. However, graphene and CNTs cannot achieve high transparency and strong EMI shielding simultaneously given that they are carbon-based materials 12 , 13 .…”

Section: Introductionmentioning

confidence: 99%

Multilayered salt water with high optical transparency for EMI shielding applications

Phan

Jung

2020

Sci Rep

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Electromagnetic interference (EMI) shielding for visual observation applications, such as windows utilized in military or aerospace, is important but difficult to realize due to conventional materials having difficulty in achieving sufficient transparency and EMI shielding simultaneously. In this paper, we present multilayered structures based on salt water for simultaneous highly optical transparency (OT) and EM shielding effectiveness (SE) performance. In the proposed structures, planar acrylic and glass were used as two types of clear substrates to hold salt water. The measured OT of both acrylic/salt water/acrylic and glass/salt water/glass structures was higher than 90% with a nearly uniform light transmission, which introduced a negligible impact on optical observation. Furthermore, both simulations and experimental results demonstrated that the SE of the multilayer structure was higher than 20 dB in the X-band from 7.5 to 8.5 GHz. Moreover, the SE was significantly enhanced by increasing the thickness of the salt water layer. Especially, both OT and SE of the multilayered structures were improved simultaneously by increasing the salinity of the salt water. These proposed structures demonstrate great potential in EMI shielding observation applications.

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Low-visibility patterning of transparent conductive silver-nanowire films

Cited by 24 publications

References 10 publications

High Performance Flexible Transparent Electrode via One‐Step Multifunctional Treatment for Ag Nanonetwork Composites Semi‐Embedded in Low‐Temperature‐Processed Substrate for Highly Performed Organic Photovoltaics

High Performance Flexible Transparent Electrode via One‐Step Multifunctional Treatment for Ag Nanonetwork Composites Semi‐Embedded in Low‐Temperature‐Processed Substrate for Highly Performed Organic Photovoltaics

Patterned transparent electrode with a continuous distribution of silver nanowires produced by an etching-free patterning method

Multilayered salt water with high optical transparency for EMI shielding applications

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