Nanostructured TiO2 diffraction grating fabricated via imprinting and TiCl4 treatment

Jeeyoung Lee, Jisuk Park, Myeongkyu Lee

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15 Citations (Scopus)

Abstract

We show here that a highly effective diffraction grating can be embedded into a nanoparticulate TiO2 film via imprinting combined with TiCl4 treatment. A thin TiO2 film spin-coated on a glass substrate was patterned by imprinting and this patterned layer was TiCl 4-treated with a higher concentration than for a thicker over-coated TiO2 film. Due to the refractive index difference between the two layers, the incident light could be strongly diffracted. Different types of gratings have been incorporated into the films. A line grating with a 2 μm period and 1.2 μm thickness generated diffracted beams up to 3rd-order, with total diffraction efficiencies over 90% at 633 nm. This method has potential applications in TiO2-based photovoltaic and photocatalytic devices.

Original languageEnglish
Pages (from-to)981-985
Number of pages5
JournalJournal of Materials Chemistry C
Volume2
Issue number6
DOIs
Publication statusPublished - 2014 Feb 14

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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