Three-Dimensional Nanobranched Indium–Tin-Oxide Anode for Organic Solar Cells

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• 作者：Hak Ki Yu ; Wan Jae Dong ; Gwan Ho Jung ; Jong-Lam Lee
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：October 25, 2011
• 年：2011
• 卷：5
• 期：10
• 页码：8026-8032
• 全文大小：962K
• 年卷期：0
• ISSN：1936-086X

文摘

A nanostructured three-dimensional (3D) electrode using transparent conducting oxide (TCO) is an effective approach for increasing the efficiency of optoelectronic devices used in daily life. Tin-doped indium oxide (ITO) is a representative TCO with high conductivity and a high work function for anode applications. This paper reports the fabrication of a large-area ITO nanostructure with a branch shape using an electron beam evaporation process at temperatures as low as 80 °C, which was free of any carrier gas and catalyst. The large surface to volume ratio in the anode by the ITO nanobranches increases both the hole mobility by a 3D pathway and light absorbance by scattering, resulting in organic solar cells with a 12% increase in photocurrent and 20% photoconversion efficiency based on the bulk heterojunction of P3HT [region-regular poly(3-hexylthiophene)] and PCBM [phenyl-C61-butyric acid methyl ester].