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JEET, Vol. 12, No. 4, July 2017
Comparison of Luminescence Properties of Electrochemical Luminescence Cells for Various Electrode Materials and Structures
Youl-Moon Sung
Area C - Electrophysics and Applications
Abstract The electrochemical luminescence (ECL) device was investigated, which has similar structure to the dye-sensitized solar cell. The structure of the ECL cell in this experiment reliably induces a large amount of the oxidation around electrodes. The band gap of the ECL electrode is of 3.0 - 3.2 eV. Titanium dioxide (TiO2) nanoparticle has following properties: a band gap of 3.4 eV, a lowpriced material, and 002 preferred orientation (Z-axis). Zinc Oxide (ZnO) nanorod is easy to grow in a vertical direction. In this paper, in order to determine material suitable for the ECL device, the properties of various materials for electrodes of ECL devices such as ZnO nanorod (ZnO-NR) and TiO2 nanoparticle (TiO2-NP) were compared. The threshold voltage of the light emission of the ZnONR was 2.0 V which is lower than 2.5 V of TiO2-NP. In the other hand, the luminance of TiO2-NP was 44.66 cd/m2 and was higher than that of 34 cd/m2 of ZnO-NR at the same applied voltage of 4 V. Based on the experimental results, we could conclude that TiO2-NP is a more suitable electrode material in ECL device than the ZnO-NR.
Keyword Electrochemical luminescence (ECL),TiO2 nanoparticle,ZnO nanorod,Ru(II) Complex
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