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Báo cáo hóa học: " Silver nanowire-based transparent, flexible, and conductive thin film"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Silver nanowire-based transparent, flexible, and conductive thin film | Liu and Yu Nanoscale Research Letters 2011 6 75 http www.nanoscalereslett.eom content 6 1 75 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Silver nanowire-based transparent flexible and conductive thin film Cai-Hong Liu Xun Yu Abstract The fabrication of transparent conductive and uniform silver nanowire films using the scalable rod-coating technique is described in this study. Properties of the transparent conductive thin films are investigated as well as the approaches to improve the performance of transparent silver nanowire electrodes. It is found that silver nanowires are oxidized during the coating process. Incubation in hydrogen chloride HCl vapor can eliminate oxidized surface and consequently reduce largely the resistivity of silver nanowire thin films. After HCl treatment 175 Q sq and approximately 75 transmittance are achieved. The sheet resistivity drops remarkably with the rise of the film thickness or with the decrease of transparency. The thin film electrodes also demonstrated excellent flexible stability showing 2 resistance change after over 100 bending cycles. Introduction Transparent conductive thin film electrodes are widely used for liquid crystal displays LCDs touch screens solar cells and flexible displays 1 2 . Among these applications the most commonly used materials are doped metallic oxides mainly indium tin oxide ITO because of their high electrical conductivity and high optical transparency. However there are many drawbacks in the case of ITO transparent electrodes. They are prone to cracking on flexible substrates. In addition the ITOs are costly and require high temperature during thin film fabrication processes 3 . However the future display and other optic-electronic devices will require suitable methods for flexible transparent electrodes to be produced at low cost and in a large scale such as roll-to-roll coating or ink-jet printing method. The substitutes for ITO are required for the developing .