title: Novel method to evaluate moisture permeation of the metal barrier coating on polymer substrate.
abstract: Water is detrimental to the performance of organic light-emitting devices and organic solar cells. A novel weight gain test (WGT) was introduced and demonstrated to measure the low permeation of water vapor through a metallic barrier coating on a polymer substrate. By using the WGT, the values of solubility, diffusivity and permeability for a sample are obtained with a simple experimental setup and diffusion equation. The WGT method has potential for the measurement of water-vapor permeation properties for samples with good barrier properties and irregular shape.
authors: Division of Materials Science and Engineering, Pusan National University, Pusan 609-735, Korea.
authors: Hoi-Bong
authors: HB
authors: Kim
authors: Young-Jun
authors: YJ
authors: Choi
authors: Kwun Nam
authors: KN
authors: Hui
authors: Changsoo
authors: C
authors: Jang
authors: Young-Rae
authors: YR
authors: Cho