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학술지 Highly Smooth and Refractive Films Fabricated from Titanium Oxide Hydrate Solution
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저자
박승구, 주철웅, 김주연, 권병화, 신진욱, 조두희, 문제현, 이정익
발행일
201510
출처
Materials Letters, v.157, pp.248-251
ISSN
0167-577X
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.matlet.2015.05.027
협약과제
14PB1200, 에너지 절감을 위한 외광효율이 최대 100% 향상된 OLED용 광추출 기초 원천기술 개발, 이정익
초록
Highly smooth, refractive, and transparent films have recently received attention in the fields of lighting and display applications for being used as energy saving devices via light extraction. Here, we have prepared a titanium oxide hydrate solution from titanium (IV) butoxide in N, N-dimethyl acetamide (DMAc) and evaluated inorganic films fabricated from the solution. The solution was transparent and homogenous mainly due to the complexation of titanium oxide hydrate with DMAc. The solution was spin-coated on a silicon wafer or a glass plate and dried under nitrogen to create a transparent film. The refractive index of the film was ca.1.97 at a wavelength of 550 nm, even when it was annealed at a low temperature of 150 °C. Atomic force microscope (AFM) results showed that the films were highly smooth and that the root-mean-square (Ra) values of the film柳s surface roughness were sub-nm scale, irrespective of the film drying condition. We identified our titanium oxide hydrate solution in DMAc as a possible good candidate material for films with a high refractive index and surface evenness.
키워드
Complexation, Planarization, Refractive index, Thin film, Titanium oxide hydrate solution
KSP 제안 키워드
Atomic force microscope(AFM), Display applications, Drying condition, Energy saving devices, Film drying, Glass plate, Inorganic films, Low temperature(LT), N-Dimethyl acetamide, Root mean square(RMS), Silicon wafer