Large block copolymer self-assembly for fabrication of subwavelength nanostructures for applications in optics

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dc.contributor.authorMokarian-Tabari, Parvaneh
dc.contributor.authorSenthamaraikannan, Ramsankar
dc.contributor.authorGlynn, Colm
dc.contributor.authorCollins, Timothy W.
dc.contributor.authorCummins, Cian
dc.contributor.authorNugent, David
dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorMorris, Michael A.
dc.contributor.funderEnterprise Irelanden
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2018-05-09T10:45:04Z
dc.date.available2018-05-09T10:45:04Z
dc.date.issued2017-04-05
dc.date.updated2018-05-03T07:20:57Z
dc.description.abstractNanostructured surfaces are common in nature and exhibit properties such as antireflectivity (moth eyes), self-cleaning (lotus leaf), iridescent colors (butterfly wings), and water harvesting (desert beetles). We now understand such properties and can mimic some of these natural structures in the laboratory. However, these synthetic structures are limited since they are not easily mass produced over large areas due to the limited scalability of current technologies such as UV-lithography, the high cost of infrastructure, and the difficulty in nonplanar surfaces. Here, we report a solution process based on block copolymer (BCP) self-assembly to fabricate subwavelength structures on large areas of optical and curved surfaces with feature sizes and spacings designed to efficiently scatter visible light. Si nanopillars (SiNPs) with diameters of ∼115 ± 19 nm, periodicity of 180 ± 18 nm, and aspect ratio of 2–15 show a reduction in reflectivity by a factor of 100, <0.16% between 400 and 900 nm at an angle of incidence of 30°. Significantly, the reflectivity remains below 1.75% up to incident angles of 75°. Modeling the efficiency of a SiNP PV suggests a 24.6% increase in efficiency, representing a 3.52% (absolute) or 16.7% (relative) increase in electrical energy output from the PV system compared to AR-coated device.en
dc.description.sponsorshipEnterprise Ireland (Commercialisation Fund- CF/2014//4055)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMokarian-Tabari, P., Senthamaraikannan, R., Glynn, C., Collins, T. W., Cummins, C., Nugent, D., O’Dwyer, C. and Morris, M. A. (2017) 'Large Block Copolymer Self-Assembly for Fabrication of Subwavelength Nanostructures for Applications in Optics', Nano Letters, 17(5), pp. 2973-2978. doi: 10.1021/acs.nanolett.7b00226en
dc.identifier.doi10.1021/acs.nanolett.7b00226
dc.identifier.endpage2978en
dc.identifier.issn1530-6984
dc.identifier.issn1530-6992
dc.identifier.journaltitleNano lettersen
dc.identifier.startpage2973en
dc.identifier.urihttps://hdl.handle.net/10468/6045
dc.identifier.volume17en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2278/IE/Advanced Materials and BioEngineering Research Centre (AMBER)/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/15/TIDA/2893/IE/Advanced Battery Materials for High Volumetric Energy Density Li-ion Batteries for Remote Off-Grid Power/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2581/IE/Diffractive optics and photonic probes for efficient mouldable 3D printed battery skin materials for portable electronic devices/en
dc.relation.urihttp://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b00226
dc.rights© 2017 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.7b00226en
dc.subjectSubwavelength nanostructuresen
dc.subjectAntireflective surfacesen
dc.subjectReflectivityen
dc.subjectOmnidirectionalen
dc.subjectGraded refractive indexen
dc.subjectBlock copolymersen
dc.subjectOpticsen
dc.titleLarge block copolymer self-assembly for fabrication of subwavelength nanostructures for applications in opticsen
dc.typeArticle (preprint)en
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