Broadband moth-eye antireflection coatings on silicon

Authors

Chih-Hung Sun, University of FloridaFollow
Peng Jiang, University of FloridaFollow
Bin Jiang, Portland State UniversityFollow

Sponsor

This work was supported in part by the NSF under Grant No. CBET-0651780, the start-up funds from the University of Florida, and the UF Research Opportunity Incentive Seed Fund.

Published In

Applied Physics Letters

Document Type

Article

Publication Date

2-1-2008

Subjects

Biomimicry, Optical coatings -- Design and construction, Silicon solar cells -- Design and construction, Colloids -- Optical properties

Abstract

We report a bioinspired templating technique for fabricating broadband antireflection coatings that mimic antireflective moth eyes. Wafer-scale, subwavelength-structured nipple arrays are directly patterned on silicon using spin-coated silica colloidal monolayers as etching masks. The templated gratings exhibit excellent broadband antireflection properties and the normal-incidence specular reflection matches with the theoretical prediction using a rigorous coupled-wave analysis (RCWA) model. We further demonstrate that two common simulation methods, RCWA and thin-film multilayer models, generate almost identical prediction for the templated nipple arrays. This simple bottom-up technique is compatible with standard microfabrication, promising for reducing the manufacturing cost of crystalline silicon solar cells.

Description

This is the publisher's final pdf. Article appears in Applied Physics Letters (http://apl.aip.org/) and is copyrighted (2008) by the American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

DOI

10.1063/1.2870080

Persistent Identifier

http://archives.pdx.edu/ds/psu/7271

Citation Details

Sun, C., Jiang, P., & Jiang, B. (2008). Broadband moth-eye antireflection coatings on silicon. Applied Physics Letters, 92(6), 061112