Fabrication of a Completely Transparent and Highly Flexible ITO Nanoparticle Electrode at Room Temperature

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• 作者：Jungheum Yun ; Yeon Hyun Park ; Tae-Sung Bae ; Sunghun Lee ; Gun-Hwan Lee
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：January 9, 2013
• 年：2013
• 卷：5
• 期：1
• 页码：164-172
• 全文大小：539K
• 年卷期：v.5,no.1(January 9, 2013)
• ISSN：1944-8252

文摘

We report the fabrication of a highly flexible indium tin oxide (ITO) electrode that is completely transparent to light in the visible spectrum. The electrode was fabricated via the formation of a novel ITO nanoarray structure, consisting of discrete globular ITO nanoparticles superimposed on an agglomerated ITO layer, on a heat-sensitive polymer substrate. The ITO nanoarray spontaneously assembled on the surface of the polymer substrate by a simple sputter coating at room temperature, without nanolithographic or solution-based assembly processes being required. The ITO nanoarray exhibited a resistivity of approximately 2.3 脳 10^鈥? 惟 cm and a specular transmission of about 99% at 550 nm, surpassing all previously reported values of these parameters in the case of transparent porous ITO electrodes synthesized via solution-based processes at elevated temperatures. This novel nanoarray structure and its fabrication methodology can be used for coating large-area transparent electrodes on heat-sensitive polymer substrates, a goal unrealizable through currently available solution-based fabrication methods.

Keywords:

transparent electrode; indium tin oxide; nanoparticles; porous films; flexibility; polymer substrate