Evaluation of gas permeation barrier properties using electrical measurements of calcium degradation

Jin Hwan Choi, Young Min Kim, Young Wook Park, Jin Woo Huh, Byeong Kwon Ju, In Sun Kim, Hee Nam Hwang

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)


In this work, we developed a thin calcium degradation method introducing sensitive electrical resistance monitoring. We have demonstrated structural models of the inorganic/organic thin films to evaluate barrier properties against water and oxygen permeation. The time-dependent transmission curve of a multibarrier coated on both sides of the polyethersulfone substrate had a linear slope which was measured as 5.17× 10-3 g m2 day at 20 °C and 60% relative humidity. This system can measure an accurate permeation rate with a high sensitivity in the measurable range of 101 - 10-6 g m2 day. In addition, the test structure devised is applicable to various fabrication techniques for passivation layers with durability and ultralow permeability for flexible organic light emitting diodes.

Original languageEnglish
Article number064701
JournalReview of Scientific Instruments
Issue number6
Publication statusPublished - 2007

Bibliographical note

Funding Information:
This research was supported by a grant (F0004041-2006-22) from the Information Display R&D Center, one of the 21st Century Frontier R&D Program funded by Ministry of Commerce, Industry and Energy of the Korean Government.

ASJC Scopus subject areas

  • Instrumentation


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