Evaluation of gas permeation barrier properties using electrical measurements of calcium degradation.
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 x 10(-3) gm(2) day at 20 degrees C and 60% relative humidity. This system can measure an accurate permeation rate with a high sensitivity in the measurable range of 10(1)-10(-6) gm(2) 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.
Choi
Jin Hwan
JH
Display and Nanosystem Laboratory, College of Engineering, Korea University, 5-1 Anam-Dong, Seongbuk-Gu, Seoul 136-713, Korea.
Kim
Young Min
YM
Park
Young Wook
YW
Huh
Jin Woo
JW
Ju
Byeong Kwon
BK
Kim
In Sun
IS
Hwang
Hee Nam
HN
D002118:Calcium / Q000032:analysis* / Q000737:chemistry; D017097:Electric Impedance; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry*; D008422:Materials Testing / Q000295:instrumentation* / Q000379:methods; D008567:Membranes, Artificial; D010100:Oxygen / Q000737:chemistry*; D016062:Porosity; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014867:Water / Q000737:chemistry*
D005740:Gases; D008567:Membranes, Artificial; D014867:Water; D010100:Oxygen; D002118:Calcium