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Graphene-based nanolaminates as ultra-high permeation barriers

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

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(en)
Physik Nanostrukturierter Materialien
Externe Organisation(en)
University of Cambridge, Cranfield University, Centre for Process Innovation, National Physical Laboratory
Journal
npj 2D Materials and Applications
Band
1
Anzahl der Seiten
8
ISSN
2397-7132
DOI
https://doi.org/10.1038/s41699-017-0037-z
Publikationsdatum
10-2017
Peer-reviewed
Ja
ÖFOS 2012
103020 Oberflächenphysik, 103042 Elektronenmikroskopie
Schlagwörter
ASJC Scopus Sachgebiete
Mechanics of Materials, Condensed Matter Physics, Mechanical Engineering, Allgemeine Chemie, Allgemeine Materialwissenschaften
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/e9946a85-e6cf-481b-bc60-cd6f435d9180