Templated fabrication of large area subwavelength antireflection gratings on silicon

By Chih-Hung Sun, Wei-Lun Min, N. Linn, Peng Jiang, B. Jiang. 2007

147 citations recorded by the source corpus.

We report a cheap and scalable bottom-up technique for fabricating wafer-scale, subwavelength-structured antireflection coatings on single-crystalline silicon substrates. Spin-coated monolayer colloidal crystals are utilized as shadow masks to generate metallic nanohole arrays. Inverted pyramid arrays in silicon can then be templated against nanoholes by anisotropic wet etching. The resulting subwavelength gratings greatly suppress specular reflection at normal incidence. The reflection spectra for flat silicon and the templated gratings at long wavelengths agree well with the simulated results using a rigorous coupled wave analysis model. These subwavelength gratings are of great technological importance in crystalline silicon solar cells.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/1024d3ee2e602b38ee977a7b200f0da67f6bfc9f

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In Electrical and Electronic Engineering

  1. K. Sun
  2. J. Y. Chen

In Surfaces, Coatings and Films

  1. K. Sun
  2. J. Y. Chen

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