CuCl2-Mediated Synthesis of Silver Nanowires for Flexible Transparent Conducting Films

Nathaniel De Guzman,Mary Donnabelle Balela,C Guojian,Y Muhammad

doi:10.1051/matecconf/20152703007

Nathaniel De Guzman, Mary Donnabelle Balela + Show 2 more

Open Access

https://doi.org/10.1051/matecconf/20152703007

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Abstract

Silver nanowires (Ag) were successfully synthesized by a copper chloride (CuCl2)-mediated polyol method at 155oC. Scanning electron microscopy (SEM) and X-Ray diffraction were employed to investigate the morphology and structure of the Ag products, respectively. Without CuCl2, mostly nanoparticles were formed. On the other hand, Ag nanowires with an average length of about 18.8 m and an average diameter of about 96.3 nm were formed after addition of 1.6 M of CuCl2. This suggests that the morphology of the Ag nanowire can be tailored by varying the amount of CuCl2. Ag nanowire suspension in ethanol was evenly coated on cellulose acetate substrates using Meyer rod coating. The electrodes were annealed at 150°C for 30 min to remove the organic materials on the surface of the nanowires. A sheet resistance of <50 ohms/sq with an optical transmittance of 80% at 550nm was obtained for an electrode with a nanowire density of 0.1 mg/cm2.

Highlights

Transparent conducting films, typically made of oxides, is widely applied in liquid crystal displays (LCDs), light-emitting diodes (LEDs), and other flexible electronics due to their high conductivity and optical transparency.[1]
Candidate materials include graphene [3], carbon nanotubes [4], conductive polymers [5], and metal nanowires [6]-[8]. Metal nanowires, such as silver (Ag) and copper (Cu), are considered as the best replacement due to their excellent electrical conductivity, which could be comparable to those of indium tin oxide (ITO). They exhibit excellent malleability, which is advantageous for flexible electronics [9].Ag nanowires could be a good alternative because of its high electrical conductivity, which is the highest among
Though Ag is comparable to Inin terms of market price, large amount of Ag nanowires can be synthesized in solution at ambient temperatures

Summary

Introduction

Transparent conducting films, typically made of oxides, is widely applied in liquid crystal displays (LCDs), light-emitting diodes (LEDs), and other flexible electronics due to their high conductivity and optical transparency.[1]. Candidate materials include graphene [3], carbon nanotubes [4], conductive polymers [5], and metal nanowires [6]-[8] Metal nanowires, such as silver (Ag) and copper (Cu), are considered as the best replacement due to their excellent electrical conductivity, which could be comparable to those of ITO. They exhibit excellent malleability, which is advantageous for flexible electronics [9].Ag nanowires could be a good alternative because of its high electrical conductivity, which is the highest among. Various printing techniques for Ag nanowires on different types of substrates have been explored to produce transparent flexible conducting electrodes [9] This includes spin-coating [7], drop casting [8], and air-spraying [8], vacuum filtration [9] and Meyer rod coating [10]. Ag nanowire suspension in ethanol was evenly coated on polymer substrates to fabricate transparent flexible conducting films

Synthesis of Ag nanowires

Electrode fabrication and Characterization

Results and discussion

Summary