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Multilayer barrier films comprising nitrogen spacers between free-standing barrier layers
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FIG. 1.

(a) An organic electronic device encapsulated with nitrogen gas-phase spacers between free-standing barrier films. is an encapsulations epoxy, is a cathode, and is an anode. (b) Depiction of the equilibrium delay in an encapsulation architecture utilizing nitrogen gas-phase spacers between free-standing barrier films. The axis denotes the chemical potential while the axis denotes the permeation distance (d).

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FIG. 2.

Transmission as a function of time for Ca films encapsulated with Kureha (blue) and Kureha-spacer-Kureha (red). The temperature was and the relative humidity was 60% for all of these runs.

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FIG. 3.

Transmission as a function of time for Ca films encapsulated with PET (blue), Cytop™ (red), Cytop™-spacer-Kureha (purple) and Cytop™-spacer-Kureha-spacer-PET (green). The temperature was and the relative humidity was 60% for all of these runs.

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/content/aip/journal/apl/95/9/10.1063/1.3222971
2009-09-04
2014-04-25

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 and , 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 Cytop™-Kureha structure from 7000 to 12000 min.

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Scitation: Multilayer barrier films comprising nitrogen spacers between free-standing barrier layers
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/9/10.1063/1.3222971
10.1063/1.3222971
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