Graphene-based nanolaminates as ultra-high permeation barriers
Graphene-based nanolaminates as ultra-high permeation barriers
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DOI：
10.1038/s41699-017-0037-z
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发表时间：
2017-10-23
影响因子：
9.7
通讯作者：
Hofmann, Stephan
中科院分区：
文献类型：
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作者：
Sagade, Abhay A.;Aria, Adrianus I.;Hofmann, Stephan
渗透阻隔膜对于广泛的应用至关重要。特别是，对于有机电子和光伏发电，不仅需要超低渗透值，还需要光学透明度。因此，层压结构允许不同材料之间的协同效应。在这里，我们报告了化学气相沉积（CVD）和原子层沉积（ALD）的结合，以可扩展的方式创建基于石墨烯/氧化铝的几层纳米层压材料。由此产生的类似于 10 nm 连续柔性石墨烯薄膜的光学透明度 >90%，并且在 5 x 5 cm(2) 面积上测量的水蒸气透过率低于 7 x 10(-3) g/m(2)/天。我们采用这些薄膜为有机发光二极管 (OLED) 提供有效封装，测得其在环境中的半衰期为 880 小时。
Permeation barrier films are critical to a wide range of applications. In particular, for organic electronics and photovoltaics not only ultra-low permeation values are required but also optical transparency. A laminate structure thereby allows synergistic effects between different materials. Here, we report on a combination of chemical vapor deposition (CVD) and atomic layer deposition (ALD) to create in scalable fashion few-layer graphene/aluminium oxide-based nanolaminates. The resulting similar to 10 nm contiguous, flexible graphene-based films are >90% optically transparent and show water vapor transmission rates below 7 x 10(-3) g/m(2)/day measured over areas of 5 x 5 cm(2). We deploy these films to provide effective encapsulation for organic light-emitting diodes (OLEDs) with measured half-life times of 880 h in ambient.