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Simulation Design for Rutile-TiO2 Nanostructures with a Large Complete-Photonic Bandgap in Electrolytes

Author(s): Sachiko Matsushita | Mikiro Hayashi | Toshihiro Isobe | Akira Nakajima

Journal: Crystals
ISSN 2073-4352

Volume: 2;
Issue: 4;
Start page: 1483;
Date: 2012;
Original page

Keywords: photonic band diagram | photonic band gap | photocatalyst | dye-sensitized solar cell | electrochemical reaction

The photonic bands of various TiO2 2D photonic crystals, i.e., cylindrical, square and hexagonal columns connected with/without walls and filled with acetonitrile, were investigated from the perspective of dye-sensitized solar cells. The finite-difference time-domain methods revealed that two-dimensional (2D) photonic crystals with rods connected with walls composed of TiO2 and electrolytes had complete photonic band gaps under specific conditions. This optimally designed bandgap reaches a large Δω/ωmid value, 1.9%, in a triangular array of square rods connected with walls, which is the largest complete 2D bandgap thus far reported for a photochemical system. These discoveries would promote the photochemical applications of photonic crystals.
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