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최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- In this study we have optimized the thin film formation technology of barrier coating materials film (PVA/SiO2) on the PEN substrate and developed thin film barrier with enhanced properties, which is expected to increase the device life time. Optical transmittance was over 90% after the barrier coating, and the surface roughness was under 10 nm for most cases allowing the process feasible for commercial applications.
- We have optimized the coating conditions and measured the optical and surface properties of deposited barrier layer. The aim was to decrease the WVTR (water vapor transmittance rate) and OTR (oxygen transmittance rate) to increase the life time of electronic devices.
이론/모형
- So for the increase of device life time, prevention of permeation of water vapor and oxygen is highly essential [2, 6]. In this work we applied wet coating of PVA/SiO2 organic-inorganic hybrid materials layer by spin-coating method. We have optimized the coating conditions and measured the optical and surface properties of deposited barrier layer.
- The PVA/SiO2 hybrid solution was prepared by using the slight modification of Dukjoon Kim’s method [7].
- hybrid gel-coating solution was coated on PEN substrate by spin-coating (6000 rpm, 30 sec) method, and then barrier-coated PEN substrate was dried in an oven (90 ℃) for 3 hr. To investigate the surface morphology (roughness) of barrier-coated flexible substrate, atomic force microscopy (AFM) technique was used. We also measured the substrates’ optical properties by optical transmittance (UV-Vis) and the substrates’ barrier properties by oxygen transmittance tester (OX-TRAN 2/21 MD) and water vapor transmittance rate tester (PERMATRAN-W 3/33 MA).
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