The Role of Mixed Reaction Promoters in Polyol Synthesis of High Aspect Ratio Ag Nanowires for Transparent Conducting Electrodes

Zarandi, Ali Amiri; Khosravi, Alireza; Dehghani, Mehdi; Tajabadi, Fariba; Taghavinia, Nima

doi:10.1007/s11664-020-08206-7

Cited by 5 publications

(2 citation statements)

References 53 publications

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“…AgNWs have been synthesized using a so-called polyol process 48 . Silver nitrate (0.11 mM) was dissolved in 24 mL of ethylene glycol (EG).…”

Section: Methodsmentioning

confidence: 99%

Chemically-stable flexible transparent electrode: gold-electrodeposited on embedded silver nanowires

Gholami,

Tajabadi,

Taghavinia

et al. 2023

Sci Rep

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Silver nanowires (AgNWs) with a low diameter, high aspect ratio, stable suspension, and easy synthesis have recently attracted the optoelectronic industry as a low-cost alternative to indium tin oxide transparent conductive films. However, silver nanowires are not chemically stable, and their conductivity diminishes over time due to reactions with atmospheric components. This is a bottleneck for their wide industrial applications. In this study, we aim to address this issue by synthesizing silver nanowires with an average diameter of approximately 65 nm and a length of approximately 13 µm. The prepared Ag nanowires are then applied to fabricate transparent, flexible, and chemically stable conductive films. The fabrication includes spraying of silver nanowires suspension on a glass substrate followed by Dr. blade coating of polystyrene (PS) solution and delamination of the PS-AgNWs film. The resulting film exhibits an optimum sheet resistance of 24 Ω/□ and transmittance of 84%. To further enhance the stability of the transparent conductive film, the facial and scalable double pulse electrodeposition method is used for coating of gold on the exposed surface of the AgNWs embedded in PS. The final transparent film with gold coating demonstrates a remarkable stability under harsh conditions including long exposure to UV light and nitric acid solution. After 100 min of UV/Ozone treatment, the increase in sheet resistance of the optimal PS-AgNW@Au sample is 15.6 times lower than the samples without gold coating. In addition, the change in sheet resistance after 2000 bending cycles in the optimal PS-AgNW@Au electrode is measured and it showed an increase of only 22% of its initial sheet resistance indicating its good flexibility. The proposed electrode performs an excellent chemical stability, good conductivity, transparency, and flexibility that makes it a potential candidate for various optoelectronic devices.

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“…AgNWs have been synthesized using a so-called polyol process 48 . Silver nitrate (0.11 mM) was dissolved in 24 mL of ethylene glycol (EG).…”

Section: Methodsmentioning

confidence: 99%

Chemically-stable flexible transparent electrode: gold-electrodeposited on embedded silver nanowires

Gholami,

Tajabadi,

Taghavinia

et al. 2023

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Silver nanowire (Ag NW) networks exhibit exceptional flexibility, electrical conductivity, optical transmittance, and the advantage of facile synthesis and deposition, positioning them as a competitive candidate to replace indium tin oxide in various applications [1][2][3][4][5]. The polyol method has mainly been applied to the synthesis of Ag NWs for its relatively gentle reaction conditions and facile processing [6][7][8]. Although synthesized Ag NWs can be directly deposited onto substrates to form conductive films, the resistance of a Ag NW film is mainly dependent on the resistance at the Ag NW junctions, which is much greater than the resistance of the Ag NW itself, hindering their applications.…”

Section: Introductionmentioning

confidence: 99%

Solvent Welding-Based Methods Gently and Effectively Enhance the Conductivity of a Silver Nanowire Network

Zhu,

Wang,

et al. 2023

Nanomaterials

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To enhance the conductivity of a silver nanowire (Ag NW) network, a facile solvent welding method was developed. Soaking a Ag NW network in ethylene glycol (EG) or alcohol for less than 15 min decreased the resistance about 70%. Further combined solvent processing via a plasmonic welding approach decreased the resistance about 85%. This was achieved by simply exposing the EG-soaked Ag NW network to a low-power blue light (60 mW/cm2). Research results suggest that poly(vinylpyrrolidone) (PVP) dissolution by solvent brings nanowires into closer contact, and this reduced gap distance between nanowires enhances the plasmonic welding effect, hence further decreasing resistance. Aside from this dual combination of methods, a triple combination with Joule heating welding induced by applying a current to the Ag NW network decreased the resistance about 96%. Although conductivity was significantly enhanced, our results showed that the melting at Ag NW junctions was relatively negligible, which indicates that the enhancement in conductivity could be attributed to the removal of PVP layers. Moreover, the approaches were quite gentle so any potential damage to Ag NWs or polymer substrates by overheating (e.g., excessive Joule heating) was avoided entirely, making the approaches suitable for application in devices using heat-sensitive materials.

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All-spray multilayer transparent electrode based on Ag nanowires: improved adhesion and thermal/chemical stability

Zarandi

Khosravi

Dehghani

et al. 2020

J Mater Sci: Mater Electron

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The Role of Mixed Reaction Promoters in Polyol Synthesis of High Aspect Ratio Ag Nanowires for Transparent Conducting Electrodes

Cited by 5 publications

References 53 publications

Chemically-stable flexible transparent electrode: gold-electrodeposited on embedded silver nanowires

Chemically-stable flexible transparent electrode: gold-electrodeposited on embedded silver nanowires

Solvent Welding-Based Methods Gently and Effectively Enhance the Conductivity of a Silver Nanowire Network

All-spray multilayer transparent electrode based on Ag nanowires: improved adhesion and thermal/chemical stability

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