TITLE

Multilayer barrier films comprising nitrogen spacers between free-standing barrier layers

AUTHOR(S)
Granstrom, Jimmy; Villet, Michael; Chatterjee, Tirtha; Gerbec, Jeffrey A.; Jerkunica, Evan; Roy, Anshuman
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p093306
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An encapsulation architecture for organic electronic devices utilizing nitrogen gas-phase spacers between free-standing barrier films is demonstrated. The nitrogen spacers act as sinks for permeating H2O and O2, delaying establishment of steady-state chemical potential gradients across the barriers and thereby reducing permeation rates. Water vapor transmission through nitrogen-spaced barriers was measured via the calcium optical transmission test. Substantial reductions in permeation rate were observed for a variety of barrier materials and configurations, suggesting a general and cost-effective approach for improving encapsulation performance. A low-cost polyethylene terephthalate film increases the calcium lifetime of a Cytopâ„¢-Kureha structure from 7000 to 12000 min.
ACCESSION #
44066532

 

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