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Accurate and stable equal-pressure measurements of water vapor transmission rate reaching the 10^-6?g m^-2 day^-1 range.

ABSTRACT: The water vapor transmission rate (WVTR) of a gas barrier coating is a critically important parameter for flexible organic device packaging, but its accurate measurement without mechanical stress to ultrathin films has been a significant challenge in instrumental analysis. At the current stage, no reliable results have been reported in the range of 10^-6?g m^-2 day^-1 that is required for organic light emitting diodes (OLEDs). In this article, we describe a solution for this difficult, but important measurement, involving enhanced sensitivity by a cold trap, stabilized temperature system, pumped sealing and calibration by a standard conductance element.

SUBMITTER: Nakano Y

PROVIDER: S-EPMC5066313 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

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Accurate and stable equal-pressure measurements of water vapor transmission rate reaching the 10-6 g m-2 day-1 range.

Nakano Yoichiro Y Yanase Takashi T Nagahama Taro T Yoshida Hajime H Shimada Toshihiro T

Scientific reports 20161017

The water vapor transmission rate (WVTR) of a gas barrier coating is a critically important parameter for flexible organic device packaging, but its accurate measurement without mechanical stress to ultrathin films has been a significant challenge in instrumental analysis. At the current stage, no reliable results have been reported in the range of 10-6 g m-2 day-1 that is required for organic light emitting diodes (OLEDs). In this article, we describe a solution ...[more]

PMID: 27748431

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