Abstract
This paper introduces a simple hydrazine treatment method to reduce the yellowing of silver nanowire transparent conductive electrodes. To investigate the effects of hydrazine treatment on the yellowing of silver nanowire electrodes, the optical and electrical properties of silver nanowire electrodes were analyzed before and after hydrazine treatment. The optimal hydrazine treatment conditions were investigated by varying the concentration and thickness of hydrazine; the effect of hydrazine treatment on the long-term stability of silver nanowires was also analyzed.
Highlights
Transparent conductive electrodes (TCEs) play an important role in various optoelectronic devices such as organic light-emitting devices, solar cells, and touch screens because they affect the characteristics of these devices, such as the transmission and absorption of light, injection, and extraction of light.[1,2,3] The flexible TCEs market has been growing at a rapid pace in accordance with the development of information technology and the demand of consumers, who want light and portable products.Indium tin oxide (ITO), most commonly used in TCEs, has low sheet resistance and high transmittance
To investigate the effects of hydrazine treatment on the optical and electrical properties of the silver nanowire TCEs, silver nanowires coated on glass, polyester sulfone (PES), and polyethylene terephthalate (PET) substrates were treated with hydrazine
“Substrate” refers to substrates that did not undergo any treatment; “Hydrazine on substrate” refers to substrates treated with hydrazine without forming silver nanowires; “Bare Ag NW” refers to substrates coated with a silver nanowire solution; and “Hydrazine on Ag NW” refers to silver nanowire TCEs coated with a hydrazine solution
Summary
Transparent conductive electrodes (TCEs) play an important role in various optoelectronic devices such as organic light-emitting devices, solar cells, and touch screens because they affect the characteristics of these devices, such as the transmission and absorption of light, injection, and extraction of light.[1,2,3] The flexible TCEs market has been growing at a rapid pace in accordance with the development of information technology and the demand of consumers, who want light and portable products. Among the various candidate materials, silver nanowires, carbon nanotubes, graphene, and metal meshes are representative materials that can replace ITO electrodes.[4,5,6,7] These materials ensure flexibility of the electrode, which is one of the disadvantages of ITO electrodes. Some of these materials still have low electrical and optical properties and high manufacturing costs compared with those of ITO electrodes and remain at the research stage. We developed a very simple hydrazine treatment method to reduce the yellowing of silver nanowire TCEs without changing the electrical properties of the TCEs; the hydrazine treatment improved the long-term stability of the silver nanowire TCEs
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