Fabrication of Large Area Broadband and Omnidirectional Antireflective Transparent Foils by Roll-to-Roll Extrusion Coating

Research output: Contribution to journalJournal article – Annual report year: 2017Researchpeer-review

Documents

DOI

View graph of relations

This study investigates the fabrication and performance of broadband and omnidirectional antireflective polymer foils, in the visible spectrum (400–800 nm), consisting of subwavelength inverted moth-eye structures. The foils are fabricated by a high throughput roll-to-roll extrusion coating process allowing structuring on both sides at a rate of 60 m min−1, with web width 45 cm. The highest average transmittance obtained in the visible spectrum is (98 ± 1) %; compared with (92 ± 1) % for the unstructured foil. The antireflective foil shows no significant difference in transmittance between normal incidence and incidence up to at least 60°. The foil performance is also investigated for different depths (Dp) and shapes of structures. The transmittance initially increases with Dp and reaches a maximum at Dp ≈ 120 nm. For process parameters yielding greater depths, other shape factors also play a critical role in the foil's antireflective properties.
Original languageEnglish
Article number1700027
JournalMacromolecular Materials & Engineering
Number of pages7
ISSN1438-7492
DOIs
Publication statusPublished - 2017
CitationsWeb of Science® Times Cited: No match on DOI

Download statistics

No data available

ID: 132273625