상세정보
학술지
Reduced Water Vapor Transmission Rates of Low-temperature processed and Sol-gel-derived Titanium Oxide Thin Films on Flexible Substrates
- 저자
- 박선욱, 김래호, 정용진, 김경훈, 박민, 백용화, 안태규, 남수지, 장재영, 박찬언
- 발행일
- 201609
- 출처
- Organic Electronics, v.36, pp.133-139
- ISSN
- 1566-1199
- 출판사
- Elsevier
- 협약과제
- 16MB1500, 차세대 고집적/고효율 유연 ICT 소자용 3D 창의 소재 원천 기술, 이명래
- 초록
- Sol-gel-derived, crack-free, and condensed TiOx thin films with improved barrier properties were successfully fabricated on polymeric substrates with a simple two-step heat treatment at low temperatures. To assess the barrier properties of the TiOx thin films, Ca corrosion tests were conducted and their water vapor transmission rates (WVTRs) were measured. We found that the two-step heat treatment (at 45 °C for 90 min and 110 °C for 60 min) produces a close-packed TiOx structure that substantially reduces the WVTRs of the coated polymeric substrates. The WVTRs of 86 nm thick TiOx thin films on polyethylene naphthalate (PEN) substrates at a relative humidity (RH) of 90% were found to be 0.133 g m-2 day-1 at 38 °C and 0.0387 g m-2 day-1 at 25 °C. In addition, the WVTR value of the TiOx thin films on PEN substrates are stable with respect to bending: it was found to increase by only ~13% after 100 repetitions of bending with a 20 mm radius.
- KSP 제안 키워드
- Corrosion tests, Flexible substrate, Low temperature(LT), Oxide thin films, PEN substrates, Polyethylene naphthalate, Relative Humidity, Sol-gel-derived, Two-step heat treatment, Water vapor transmission, barrier properties