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Fabrication of high-transmittance and low-reflectance meter-scale moth-eye film via roll-to-roll printing

Authors
Ju, SucheolChoi, Jin-YoungChae, DongwooLim, HangyuKang, HojungLee, Heon
Issue Date
11-12월-2020
Publisher
IOP PUBLISHING LTD
Keywords
roll-to-roll printing; moth-eye film; meter-scale; environmental test
Citation
NANOTECHNOLOGY, v.31, no.50
Indexed
SCIE
SCOPUS
Journal Title
NANOTECHNOLOGY
Volume
31
Number
50
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50811
DOI
10.1088/1361-6528/aba7e4
ISSN
0957-4484
Abstract
Anti-reflection technology is a core technology in the field of optoelectronic devices that is used to increase efficiency by reducing reflectance. In particular, the bio-mimetic moth-eye pattern has the advantage of being independent of wavelength, polarization, and angle of incidence. In this study, we fabricated a 1.1 m wide meter-scale moth-eye film using roll-to-roll printing. A uniform moth-eye pattern with a height of 170 nm was formed, which reduced the average reflectance value by 3.2% and increased the average transmittance value by 3.1%, in a wide wavelength range of 400-700 nm. Additionally, the moth-eye film coated with a self-assembled monolayer (SAM) exhibited a contact angle of 140.3 degrees, almost equal to the superhydrophobic angle of 150 degrees. Furthermore, the contact angle, transmittance, and reflectance of the SAM-coated moth-eye film were maintained after an environmental test, which was conducted for 168 h at 60 degrees C and 80% humidity.
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공과대학 (신소재공학부)
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