Sorry, you need to enable JavaScript to visit this website.
office.cense@iisc.ac.in | +91-80-2293 3276/ +91-80-2293 3291 | Sitemap

Million-fold decrease in polymer moisture permeability by a graphene monolayer

TitleMillion-fold decrease in polymer moisture permeability by a graphene monolayer
Publication TypeJournal Article
Year of Publication2016
AuthorsSeethamraju, S, Kumar, S, Madras, G, Raghavan, S, Ramamurthy, PChandrashe
JournalACS nano
Volume10
Pagination6501–6509
Keywordscavity ring down spectroscopy; DFT simulations; graphene; moisture barrier; organic device encapsulation; polymer; water vapor transmission rate
Abstract

Flexible, transparent, and moisture-impermeable materials are critical for packaging applications in electronic, food, and pharmaceutical industries. Here, we report that a single graphene layer embedded in a flexible polymer reduces its water vapor transmission rate (WVTR) by up to a million-fold. Large-area, transparent, graphene-embedded polymers (GEPs) with a WVTR as low as 10–6 g m–2 day–1 are demonstrated. Monolayered graphene, synthesized by chemical vapor deposition, has been transferred onto the polymer substrate directly by a very simple and scalable melt casting process to fabricate the GEPs. The performances of the encapsulated organic photovoltaic (OPV) devices do not vary even after subjecting the GEPs to cyclic bending for 1000 cycles. Accelerated aging studies of working OPV devices encapsulated in the GEPs show a 50% lifetime of equivalent to 1 000 000 min, which satisfies the requirements of organic electronics.

DOI10.1021/acsnano.6b02588