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Title Three-dimensional Modeling for the Transmittance of ITO/Mesh-Ag/ITO Multilayers using FDTD
Authors (Eou-Sik Cho) ; (Sang Jik Kwon)
Page pp.348-355
ISSN 1598-1657
Keywords Transparent conductive oxide; mesh structure; ITO/mesh-Ag/ITO multiple layer; full-wave simulation; 3D FDTD method
Abstract In order to improve the transmittance of ITO/Ag/ITO multilayers, Ag layer was formed with mesh structure. For more accurate and practical analysis, we performed the simulations using an optical wave simulator termed the full-wave simulation program. In our simulations, the three dimensional (3D) finite-difference time-domain (FDTD) method was used to realize the high density mesh structure, and a plane wave with variable wavelengths ranging from 250 to 850 nm is incident in the z-direction at normal incidence to the ITO/Mesh-Ag/ITO film surrounded by free-air space. From the simulation results, at a higher open ratio and lower Ag thickness, the transmittance of ITO/Mesh-Ag/ITO were not influenced by other parameters. Experimental measurements were performed depending on the various Ag mesh-spaces and mesh-widths. The open ratio of about 60 % has shown the acceptable results in the points of both the optical transmittance and the electrical conductance.