[논문]Superhydrophobic, antireflective, flexible hard coatings with mechanically ultra-resilient moth-eye structure for foldable displays

Yun, Hye-Won; Choi, Gwang-Mun; Woo, Ho Kun; Oh, Soong Ju; Hong, Sung-Hoon

doi:10.1016/j.cap.2020.07.001

[국내논문] Superhydrophobic, antireflective, flexible hard coatings with mechanically ultra-resilient moth-eye structure for foldable displays

Current applied physics : the official journal of the Korean Physical Society, v.20 no.10, 2020년, pp.1163 - 1170

Yun, Hye-Won (Department of Materials Science and Engineering, Korea University) , Choi, Gwang-Mun (Wearable Platform Materials Technology Center, Korea Advanced Institute of Science and Technology (KAIST)) , Woo, Ho Kun (Department of Materials Science and Engineering, Korea University) , Oh, Soong Ju (Department of Materials Science and Engineering, Korea University) , Hong, Sung-Hoon (ICT Materials & Components Research Laboratory, ETRI)

Abstract ▼ AI-Helper

Abstract Biomimetic inspiration from the moth-eye structure has led to many studies combining nanoimprint lithography (NIL) to realize low cost and large area anti-reflection (AR) coatings. However, the scope of application is severely limited by poor mechanical performance due to the intrinsic properties of the coating materials and the nanosized patterns. In this work, we demonstrate a moth-eye structured epoxy-siloxane molecular hybrid (ME-ESMH) fabricated using single UV-based NIL (UV-NIL) on a colorless polyimide (CPI), to be utilized as a flexible cover window (FCW) for foldable displays. Low reflection, a superhydrophobicity and good inward foldability were achieved, together with excellent thermal and chemical resistance. Furthermore, in situ uniaxial compression tests revealed that the fabricated structure can be elastically deformed and nearly restored to its original shape even after a large degree of compression. Our findings provide an easy-to-integrate solution for flexible hard coatings with superhydrophobic and AR properties, applicable to foldable optoelectronics. Highlights Hybrid material based moth-eye patterns are fabricated on CPI by UV-nanoimprinting. Moth-eye patterned film shows excellent anti-reflection (AR) property with low haze. The film exhibited mechanically resilient, flexible and self-cleaning characteristics. The film is very promising for flexible hard AR coatings for foldable displays. Graphical abstract [DISPLAY OMISSION]

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DOI : 10.1016/j.cap.2020.07.001
Elsevier : 저널 > 논문

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