Type

Journal Article

Authors

Michael A. Morris
Colm O'Dwyer
David Nugent
Cian Cummins
Timothy W Collins
Colm Glynn
Ramsankar Senthamaraikannan
Parvaneh Mokarian-Tabari

Subjects

Physics

Topics
optics curved surfaces nanostructures visible light pv system subwavelength structures block copolymer self assembly fabrication

Large Block Copolymer Self-Assembly for Fabrication of Subwavelength Nanostructures for Applications in Optics. (2017)

Abstract Nanostructured 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.
Collections Ireland -> Trinity College Dublin -> PubMed

Full list of authors on original publication

Michael A. Morris, Colm O'Dwyer, David Nugent, Cian Cummins, Timothy W Collins, Colm Glynn, Ramsankar Senthamaraikannan, Parvaneh Mokarian-Tabari

Experts in our system

1
Michael A. Morris
University College Cork
Total Publications: 121
 
2
Colm O'Dwyer
University College Cork
Total Publications: 121
 
3
Cian Cummins
Trinity College Dublin
Total Publications: 18
 
4
Timothy Collins
Trinity College Dublin
Total Publications: 6
 
5
Colm Glynn
University College Cork
Total Publications: 19
 
6
Ramsankar Senthamaraikannan
University College Cork
Total Publications: 12
 
7
Parvaneh Mokarian-Tabari
University College Cork
Total Publications: 7