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International Journal of Photoenergy
Volume 2011, Article ID 679364, 6 pages
Research Article

Prediction of the Bandgap of a Core-Shell Microsphere via Light Intensity Fluctuations

Department of Chemical Engineering, Hongik University, Mapo-Gu, Seoul 121-791, Republic of Korea

Received 27 July 2010; Accepted 16 September 2010

Academic Editor: Canan Varlikli

Copyright © 2011 Moon Kyu Choi and Youngjin Choi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


It has been experimentally observed that in the case of microspheres irradiated by light, the absorption wavelength shift occurs, known as the blueshift, with changing shell materials (i.e., by decreasing the refractive index of the shell). In the present investigation, we want to demonstrate it numerically by using the boundary element method. The material used for the simulation is a core-shell (SiO2 and another material of a larger refractive index) microsphere and it is irradiated by unpolarized monochromatic light wave. This paper intends to demonstrate that it is possible to predict the bandgap of a core-shell microsphere resulting from two different bandgap materials and that the numerical simulation employed produces the blueshift.