Graphene-based nanolaminates as ultra-high permeation barriers

Author(s)
Abhay A. Sagade, Adrianus I. Aria, Steven Edge, Paolo Melgari, Bjoern Gieseking, Bernhard C. Bayer, Jannik C. Meyer, David Bird, Paul Brewer, Stephan Hofmann
Abstract

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 ~10 nm contiguous, flexible graphene-based films are >90% optically transparent and show water vapor transmission rates below 7 × 10−3 g/m2/day measured over areas of 5 × 5 cm2. We deploy these films to provide effective encapsulation for organic light-emitting diodes (OLEDs) with measured half-life times of 880 h in ambient.

Organisation(s)
Physics of Nanostructured Materials
Journal
npj 2D Materials and Applications
Volume
1
No. of pages
8
ISSN
2397-7132
DOI
https://doi.org/10.1038/s41699-017-0037-z
Publication date
10-2017
Publication status
Published
Peer reviewed
Yes
Austrian Fields of Science 2012
103020 Surface physics, 103042 Electron microscopy
Portal url
https://ucris.univie.ac.at/portal/en/publications/graphenebased-nanolaminates-as-ultrahigh-permeation-barriers(e9946a85-e6cf-481b-bc60-cd6f435d9180).html