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Optical Properties of Self-Assembled ZnO/SiO2 Photonic Crystals

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Abstract:

This study examined the optical properties and crystallinity of self-assembled ZnO/SiO2 photonic crystals using silica and ZnO nanopowders. The silica and ZnO nanopowders were fabricated using the well-known Stöber process. The photonic crystals were self-assembled using a evaporation method. The process temperature and heat-treatment temperature after evaporation were 80 °C and 250∼450 °C, respectively. The highest reflectance peak intensity was obtained in the sample heat-treated at 350 °C with 0.3 wt% ZnO addition. The ZnO/SiO2 photonic crystals clearly showed better emission properties than the SiO2/ZnO and ZnO structures.

Keywords: PHONIC CRYSTALS; PL; SELF-ASSEMBLY; SYNTHETIC OPAL; TWO-STAGE COATING; ZNO

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2008.1395

Publication date: 2008-10-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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