scholarly journals Growth of Ultralong Ag Nanowires by Electroless Deposition in Hot Ethylene Glycol for Flexible Transparent Conducting Electrodes

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Nathaniel de Guzman ◽  
Mary Donnabelle L. Balela
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
Electroless Deposition ◽  
Average Length ◽  
Optical Transmittance ◽  
Adhesion Test ◽  
Transparent Conducting ◽  
Ag Particles ◽  
Ag Nanowires ◽  
Transparent Conducting Electrodes

High aspect ratio silver (Ag) nanowires with an average length of 25.4 μm and diameter of 102.8 nm were successfully prepared by electroless deposition in hot ethylene glycol (160°C) for 1 h in the presence of PVP. It was found that both PVP concentration and molecular weight significantly influence the morphology and yield of Ag nanowires in solution. Using PVP MW = 55,000, addition of lower amounts of PVP led to formation of large irregularly shaped Ag particles together with a few rod-like structures. Increasing PVP concentration generally resulted in longer and thinner Ag nanowires. On the other hand, low molecular weight PVP produced spherical Ag particles even at high PVP concentration. Ag nanowire flexible transparent conducting electrodes attained a sheet resistance of about 92.5 Ω/sq at an optical transmittance of about 79.6% without any heat treatment. In addition, no significant change in optical and electrical properties was observed after several cycles of bending and adhesion test.

Electroless Deposition of Silver Nanowires Using Waste Ethylene Glycol for Highly Transparent Flexible Conducting Electrodes

2018 ◽  
Vol 775 ◽  
pp. 254-259
Author(s):  
Nathaniel de Guzman ◽  
Mary Donnabelle L. Balela
Keyword(s):  
Ethylene Glycol ◽  
Indium Tin Oxide ◽  
Silver Nanowires ◽  
Average Length ◽  
Average Diameter ◽  
Optical Transmittance ◽  
Transparent Conductive Electrode ◽  
Transparent Conducting ◽  
Better Than ◽  
Excellent Stability

High aspect ratio silver nanowires (AgNWs) with an average length of 40 μm and average diameter of 88 nm were successfully synthesized using waste ethylene glycol as solvent and reducing agent. Silver nanowires with an average length and diameter of 32 μm and 122 nm, were produced after the third cycle of being reused. A transparent conducting film with a sheet resistance of 69 Ω/sq and optical transmittance of 91% was fabricated by Meyer rod coating an ink formulation of AgNWs dispersed in hydroxyethyl celullose (HEC)/methanol/deionized water. The low resistance of the AgNW networks was maintained even after 1000 bending cycles due to HEC acting as binder for the nanowires. The AgNWHEC transparent conductive electrode performed better than bare AgNWs and indium tin oxide (ITO) on polyethylene terephthalate (PET) substrate after several bending cycles. The AgNW-HEC electrode also showed excellent stability against corrosion.

scholarly journals Improved Long-Term Stability of Transparent Conducting Electrodes Based on Double-Laminated Electrosprayed Antimony Tin Oxides and Ag Nanowires

2017 ◽  
Vol 62 (2) ◽  
pp. 1275-1279
Author(s):  
B.-R. Koo ◽  
J.-W. Bae ◽  
H.-J. Ahn
Keyword(s):  
Tin Oxide ◽  
Optical Transmittance ◽  
Thermal Stabilities ◽  
Long Term Stability ◽  
Transparent Conducting ◽  
Ag Nanowires ◽  
Antimony Tin Oxide ◽  
Transparent Conducting Electrodes ◽  
Ag Nanowire

AbstractWe fabricated double-laminated antimony tin oxide/Ag nanowire electrodes by spin-coating and electrospraying. Compared to pure Ag nanowire electrodes and single-laminated antimony tin oxide/Ag nanowire electrodes, the double-laminated antimony tin oxide/Ag nanowire electrodes had superior transparent conducting electrode performances with sheet resistance ~19.8 Ω/□ and optical transmittance ~81.9%; this was due to uniform distribution of the connected Ag nanowires because of double lamination of the metallic Ag nanowires without Ag aggregation despite subsequent microwave heating at 250°C. They also exhibited excellent and superior long-term chemical and thermal stabilities and adhesion to substrate because double-laminated antimony tin oxide thin films act as the protective layers between Ag nanowires, blocking Ag atoms penetration.

Investigation of the Electrical, Optical, and Mechanical Properties of Ag Nanowire Conducting Electrode

2018 ◽  
Vol 775 ◽  
pp. 156-162 ◽  
Author(s):  
Dominic C. Sanchez ◽  
Mary Donnabelle L. Balela
Keyword(s):  
Sheet Resistance ◽  
Optical Transmittance ◽  
Polymer Substrates ◽  
Electrical Stress ◽  
Transparent Conducting ◽  
Ag Nanowires ◽  
Optical And Mechanical Properties ◽  
Transparent Conducting Electrodes ◽  
Ink Formulation ◽  
Ag Nanowire

Silver (Ag) nanowire having mean diameter and length of about 170.42 nm and 20.01 µm were prepared by the polyol process in ethylene glycol. Ag nanowires transparent conducting electrodes were then fabricated by depositing the Ag nanowires in ethanol and ink formulation on polymer substrates using a Meyer rod. The Ag nanowire electrodes exhibit an optical transmittance of about 68 % due to the large diameters of the as synthesized Ag nanowires. On the other hand, the sheet resistance was measured to be about 148 ohms/sq. When expose in air for 10 weeks, the sheet resistance increase to about 13 kohms/sq. Localized Joule heating during application of electrical stress of about 2 V for 7 days has resulted in the Ag nanowire degradation.

Electroless Deposition of Silver Nanoparticles and Nanowires in Ethylene Glycol

2014 ◽  
Vol 1043 ◽  
pp. 109-113 ◽  
Author(s):  
Nathaniel de Guzman ◽  
Aurelia Mechilina ◽  
Mary Donnabelle Balela
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
Ag Nanoparticles ◽  
Electroless Deposition ◽  
Xrd Analysis ◽  
Metallic Silver ◽  
Face Centered Cubic ◽  
Structure Directing Agent ◽  
The Face ◽  
Face Centered

Silver (Ag) nanostructures, such as nanoparticles and nanowires, were formed by electroless deposition in ethylene glycol at 160 °C for 1h. Polyvinyl pyrrolidone (PVP) were used both as a capping agent and structure-directing agent to prevent agglomeration and promote the growth of Ag nanowires. The effect of its molecular weight and concentration on the morphology of Ag was examined by X-Ray Diffraction (XRD) and scanning electron microscopy (SEM). XRD analysis showed peaks corresponding to the face-centered cubic (FCC) structure of metallic silver. At low PVP molecular weight of 10,000, spherical Ag nanoparticles with a mean diameter of about 170 nm were formed. A mixture of Ag nanoparticles and nanowires were produced when the molecular weight was increased to 55,000 and 360,000.

scholarly journals Fabrication of reduced graphene oxide modified poly(3,4-ethylenedioxythiophene) polystyrene sulfonate based transparent conducting electrodes for flexible optoelectronic application

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Sandeep Sharma ◽  
Karamvir Singh ◽  
Sandeep Kumar ◽  
Kapil Bhatt ◽  
Yashashchandra Dwivedi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Sheet Resistance ◽  
Optical Transmittance ◽  
Bending Test ◽  
Polystyrene Sulfonate ◽  
Maximum Increase ◽  
Transparent Conducting ◽  
Reduced Graphene ◽  
Transparent Conducting Electrodes

AbstractPresent article reports on reduced graphene oxide (rGO) modified poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) based transparent conducting electrodes for flexible optoelectronic applications. PEDOT: PSS samples embedded with different rGO concentrations i.e. 0, 1, 2, 3, 4, 5 wt% were prepared and later on, bar coated on polyethylene terephthalate substrate using a 30 μm wire size bar. Various parameters including sheet resistance, bending test (outside and inside bending), optical transmittance etc. were estimated. Our analysis indicates that the samples with 1 wt% rGO possess improved results i.e. low sheet resistance (315 ± 8 Ω/sq.) and high transmittance (~ 74%). Additionally, the sample shows low electrical resistance variation up to 12% (maximum increase) during outward bending and 9% (maximum decrease) during inward bending of the sample for bending curvature from 20 to 100 m−1.

scholarly journals Characterization of ZnO:Al deposited by co-sputtering for transparent conductive electrodes

2015 ◽  
Vol 25 (4) ◽  
pp. 341
Author(s):  
Nguyen Tran Thuat ◽  
Bui Bao Thoa ◽  
Than Thi Cuc ◽  
Nguyen Minh Hieu ◽  
Hoang Ngoc Lam Huong ◽  
...  
Keyword(s):  
Room Temperature ◽  
Optical Transmittance ◽  
Visible Range ◽  
Electrical And Optical Properties ◽  
Transparent Conducting ◽  
Aluminum Doped Zinc Oxide ◽  
Transparent Conducting Electrodes ◽  
Transparent Conductive Electrodes ◽  
Deposition Conditions

Aluminum doped zinc oxide was prepared by magnetron sputtering methods at room temperature using a ZnO ceramic target doped 2%wt by Al2O3. The optical transmittance of the films is higher than 80% in the visible range. A direct bandgap type was reached by controlling deposition conditions; the bandgap value was in the range between 3.2 eV and 4.2 eV. Good electrical and optical properties were obtained for the films deposited by an appropriate co-sputtering of ZnO and Al targets. These films with a resistivity, about 1.3´10-2W.cm, and a transmittance, higher than 80%, can be applicable for transparent conducting electrodes.

scholarly journals Simultaneous Enhancement of Electrical and Optical Properties of Transparent Conducting RuO2 Nanosheet films by Facile Ultraviolet-Ozone Irradiation

2020 ◽  
Vol 10 (12) ◽  
pp. 4127
Author(s):  
Jong Wook Roh ◽  
Weon Ho Shin ◽  
Hyun-Sik Kim ◽  
Se Yun Kim ◽  
Sang-il Kim
Keyword(s):  
Optical Properties ◽  
Electronic Devices ◽  
Optical Transmittance ◽  
Electrical And Optical Properties ◽  
Langmuir Blodgett ◽  
Transparent Conducting Films ◽  
Transparent Conducting ◽  
Chemical Exfoliation ◽  
Simple Chemical ◽  
Transparent Conducting Electrodes

The enhancement of electrical and optical properties in transparent conducting electrodes has attracted significant interest for their application in flexible electronic devices. Herein, a method for the fabrication of transparent conducting films is proposed. In this approach, RuO2 nanosheets are synthesized by a simple chemical exfoliation method and deposited as conducting films by repeated Langmuir–Blodgett coating. For enhancing the electrical and optical properties of the films, ultraviolet-ozone irradiation is applied between the repeated coatings for the removal of residual organic materials from the chemically exfoliated nanosheets. We observe that by applying ultraviolet-ozone irradiation for 30 min, the sheet resistance of the films decreases by 10% and the optical transmittance is simultaneously enhanced. Facile ultraviolet-ozone irradiation is shown to be an effective and industrially friendly method for enhancing the electrical and optical properties of oxide nanosheets for their application as transparent conduction electrodes.

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