Open AccessSubstrate effects on the transmittance of 1D metal grid transparent electrodes
Author(s) -
Kilbock Lee,
Jinho Ahn
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.019021
Subject(s) - finite difference time domain method , transmittance , materials science , figure of merit , electrode , optics , grid , substrate (aquarium) , optoelectronics , physics , geometry , oceanography , mathematics , quantum mechanics , geology
The effect of the presence of substrates below metal grids on light transmission is investigated through finite-different time-domain (FDTD) simulations. Comparing grids on substrates with suspended grids, we identify the effects of the presence of substrates on the transmittances of metal grids. The presence of substrates below micron-scale grids has no specific effect on their transmittances; however, unexpected dips and flattened peaks in transmission spectra were observed in nano-scale grids. The figures of merits (FoMs) of metal grids are calculated using estimated transmittances and grid sheet resistances. Due to their lower resistances and higher transmittances, micron-scale grids show higher FoMs than nano-scale grids and, are thus promising transparent conducting electrode candidates. The best 1D grid electrode in this work exhibited a figure of merit, σ(dc)/σ(op), > 1000.