Transparent Conducting Film Fabricated by Metal Mesh Method with Ag and Cu@Ag Mixture Nanoparticle Pastes

Nam, Hyun Min; Seo, Duck Min; Yun, Hyung Duk; Thangavel, Gurunathan; Park, Lee Soon; Nam, Su Yong

doi:10.3390/met7050176

Cited by 12 publications

(5 citation statements)

References 9 publications

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“…But the disorderly arrangement of metal nanowires makes the inhomogeneity of film conductivity and results in the inferior quality of electrodes. Screen printing or inkjet printing can construct and arrange metal nanowires networks by using the metal precursor solution or metal nanoparticle pastes, but usually requiring a high temperature annealing (>200 °C) process. The high temperature heavily limits the selection of polymeric/elastomeric substrates.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance, Micrometer Thick/Conformal, Transparent Metal‐Network Electrodes for Flexible and Curved Electronic Devices

Liu

Xiao

Rao

et al. 2018

Adv Materials Technologies

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deposition temperature (≈300 °C) limit their applications in large-area/flexible/ curved optoelectronic devices. Therefore, several candidates, including carbon nanotubes, [4,10] graphene, [11,12] conductive polymers, [13,14] and metal-network electrodes (MNEs) [15,16] were investigated to replace ITO films. Due to the relatively low electrical conductivity of large-scale graphene and high contact resistance of carbon nanotubes, the applications of these carbon-based nanomaterials are highly limited. And further on the poor conductivity and instability of conducting polymers, MNEs are a strong candidate due to their superior electrical and optical performance. [17][18][19] The solution-processed metal nanowires such as Ag NWs [20,21] and Cu NWs [22][23][24] are excellent materials to structure high-property electrodes by a coating process. [25] However, the contact resistance at the nanogap junctions between these nanowires results in much lower conductivity compared to the evaporated metal electrodes. Moreover, the poor adhesion [26] and protrusions [27] limit the applications of these solution-processed electrodes. The continuous metal nanowires could be fabricated by the using of a electrospun nonwoven masks [28][29][30][31][32] before the metal evaporation process and avoids the influence of contact resistance. But the disorderly arrangement of metal nanowires makes the inhomogeneity of film conductivity and results in the inferior quality of electrodes. Screen printing or inkjet printing can construct and arrange metal nanowires networks by using the metal precursor solution [33,34] or metal nanoparticle pastes, [35][36][37] but usually requiring a high temperature annealing (>200 °C) process. The high temperature heavily limits the selection of polymeric/elastomeric substrates. Therefore, in addition to transparency and resistance, low preparation temperature is very important in flexible MNEs.In this work, we reported highly transparent, ultrathin/ curved MNEs fabricated by programmable electrohydrodynamic (EHD) lithography, which directly generates high-resolution pattern of photoresist on ultrathin and curved substrates. The EHD lithography technique is a simple, data-driven, and inexpensive process, avoiding exposure or development process of conventional photolithography. [38] Moreover, it does not require high-temperature heat treatment and complicated transferring, Metal-network electrodes (MNEs) are excellent substitutes to the brittle and expensive indium tin oxide (ITO) films for flexible and transparent electronic devices. For a high transmittance and low resistivity, highly ordered metal wire arrays with suitable gap and width are essential. Here, high-orderly and dimension-controllable ultrathin/conformal MNEs are fabricated on µm thick/curved substrate via programmable electrohydrodynamic (EHD) lithography. By employing EHD direct-writing, large-scale high-resolution photoresist micro/nano-pattern can be digitally printed on ultrathin/curved substrates, as the digital mask in chemical etching ...

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Section: Introductionmentioning

confidence: 99%

High‐Performance, Micrometer Thick/Conformal, Transparent Metal‐Network Electrodes for Flexible and Curved Electronic Devices

Liu

Xiao

Rao

et al. 2018

Adv Materials Technologies

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show abstract

“…It is because of their high electrical and optical properties, low resistivity, high flexibility, high figure of merit, relatively good chemical stability, and bending durability 147 . Metals such as copper (Cu), silver (Ag), and aluminum (Al) have been reported as highly conductive materials and low sheet resistance materials 148,149 . Metal nanowires may readily be deposited on films using typical solution‐based techniques including spin coating, vacuum filtering, and R2R compatible methods like spray coating, bar coating, and slot‐die coating, which are advantageous for large‐scale production 150–153 .…”

Section: Conducting Polymer Substratesmentioning

confidence: 99%

“…147 Metals such as copper (Cu), silver (Ag), and aluminum (Al) have been reported as highly conductive materials and low sheet resistance materials. 148,149 Metal nanowires may readily be deposited on films using typical solution-based techniques including spin coating, vacuum filtering, and R2R compatible methods like spray coating, bar coating, and slot-die coating, which are advantageous for large-scale production. [150][151][152][153] The potential of silver nanowires (Ag NW) as TCEs was shown by Lee et al in 2008.…”

Section: Metal Nanowiresmentioning

confidence: 99%

Progress, challenges, and perspectives on polymer substrates for emerging flexible solar cells: A holistic panoramic review

Subudhi

Punetha

2023

Progress in Photovoltaics

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In pursuit of a renewable, inexpensive, sustainable, and compact energy source to replace fossil fuels, solar photovoltaic devices have become an ideal alternative to meet human needs for environmentally friendly, affordable, and portable power sources. It is due to their excellent mechanical robustness and outstanding energy conversion efficiency. Concerning the increasing demand for flexible and wearable electronic devices with standalone power sources, much attention has been paid to photovoltaics' flexibility and lightweight developments. Along with high mechanical flexibility and lightweight, flexible photovoltaic devices have the advantages of conformability, bendability, wearability, moldability, and roll‐to‐roll processing into complex shapes that can produce niche products. Emerging solar cells, among other photovoltaic technologies, have been exalted for their high conversion efficiency, low cost, and ease of production, making them a viable new‐generation photovoltaic technology. The main commercialization choice for cutting‐edge solar cells is flexible dye‐sensitized and perovskite solar cells since they can be made using a roll‐to‐roll printing technique and are appropriate for mass manufacturing. More significantly, flexible evolving solar cells may be created on ultrathin and light substrates to fulfill the demands of the developing flexible electronics industry and discover uses that are not possible with traditional photovoltaic technology. In any flexible device, the substrate is a backbone on which further materials rely. A flexible substrate reduces the installation and transportation charges, thereby reducing the system price and increasing power conversion efficiency. In this review, we comprehensively assess relevant materials suitable for making flexible photovoltaic devices. Several flexible substrate materials, including ultra‐thin glass, metal foils, and various types of polymer materials, have been considered. For conducting materials, transparent conducting oxides, metal nanowires/grids, carbon nanomaterials, and conducting polymers have also been comprehended. Progress on various flexible foils, fabrication and stability issues, current challenges, and solutions to those challenges of using conductive polymer substrate is endorsed and reviewed in detail. The originality of this holistic study lies in its ability to offer a thorough overview of recent advancements in flexible dye‐sensitized and perovskite solar cells on polymer substrates, which is conceivable and worthy as a roadmap for future research work.

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“…Therefore, a simple, cost-effective method for creating stretchable substrates and easily forming electrode patterns is needed. This study addresses this need, with a focus on commercialization and mass production [19][20][21][22]. Our research aimed to optimize screen printing conditions and the size of silver particles for the application of silver pastes to currently mass-produced TPU films.…”

Section: Introductionmentioning

confidence: 99%

Development and Performance Evaluation of Stretchable Silver Pastes for Screen Printing on Thermoplastic Polyurethane Films

Nam,

Hwangbo,

Nam

et al. 2023

Coatings

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Efficient, stretchable wiring electrodes are achieved when the resistance change during expansion and contraction is minimal. Herein, we prepared silver pastes specifically designed for screen printing on thermoplastic polyurethane films; they exhibit minimal resistance changes. The pastes were prepared using silver particles with sizes of 2 and 7 μm as well as a mixture of 2 and 7 μm silver particles (50:50 wt%). These pastes were analyzed using methods such as rheological measurements, thermogravimetric analysis, printability tests, tensile and torsion tests, and light-emitting diode (LED) tests. The most promising results were obtained when exclusively using 2 μm silver flake particles. The pastes demonstrated a viscosity of 24,880 cps, a thixotropic index value of 2.82, excellent printability, and consistent resistance measurements even after 100% stretch, thus indicating exceptional tensile properties. Moreover, the pastes exhibited substantial stability, with no change in brightness after the attachment of seven LEDs at 20% tension.

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Transparent Conducting Film Fabricated by Metal Mesh Method with Ag and Cu@Ag Mixture Nanoparticle Pastes

Cited by 12 publications

References 9 publications

High‐Performance, Micrometer Thick/Conformal, Transparent Metal‐Network Electrodes for Flexible and Curved Electronic Devices

High‐Performance, Micrometer Thick/Conformal, Transparent Metal‐Network Electrodes for Flexible and Curved Electronic Devices

Progress, challenges, and perspectives on polymer substrates for emerging flexible solar cells: A holistic panoramic review

Development and Performance Evaluation of Stretchable Silver Pastes for Screen Printing on Thermoplastic Polyurethane Films

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