纳米复合材料
材料科学
光伏
涂层
柔性电子器件
聚氨酯
有机太阳能电池
纳米技术
聚合物
有机电子学
复合材料
数码产品
光伏系统
电气工程
电压
晶体管
工程类
作者
Daniel A. Kunz,Jasmin Schmid,Patrick Feicht,Johann Erath,Andreas Fery,Josef Breu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2013-04-04
卷期号:7 (5): 4275-4280
被引量:73
摘要
Transparency, flexibility, and especially ultralow oxygen (OTR) and water vapor (WVTR) transmission rates are the key issues to be addressed for packaging of flexible organic photovoltaics and organic light-emitting diodes. Concomitant optimization of all essential features is still a big challenge. Here we present a thin (1.5 μm), highly transparent, and at the same time flexible nanocomposite coating with an exceptionally low OTR and WVTR (1.0 × 10(-2) cm(3) m(-2) day(-1) bar(-1) and <0.05 g m(-2) day(-1) at 50% RH, respectively). A commercially available polyurethane (Desmodur N 3600 and Desmophen 670 BA, Bayer MaterialScience AG) was filled with a delaminated synthetic layered silicate exhibiting huge aspect ratios of about 25,000. Functional films were prepared by simple doctor-blading a suspension of the matrix and the organophilized clay. This preparation procedure is technically benign, is easy to scale up, and may readily be applied for encapsulation of sensitive flexible electronics.
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