The intensity and uniformity of the dielectric barrier discharge (DBD) were studied via fabrication. The DBD can be achieved by various methods using dielectrics and electrodes; however, depending on the device configuration and fabrication method, unnecessary air gaps may occur between the dielectric and electrode. The air gap increases the breakdown voltage for plasma generation, thereby affecting the characteristics of the DBD. In this study, an inner electrode was formed on the surface of a dielectric by the silver mirror reaction to eliminate the air gap; in this technique, silver is deposited on the dielectric surface by a reducing organic compound. The DBD images of the silver-coated inner electrode were investigated using an intensified charge coupled device (ICCD) camera and the OpenCV library of Python for quantitatively evaluating performance measures such as intensity and uniformity. In addition, the reactive oxygen species (ROS) generated by DBD were measured with a band-pass filter and the ICCD camera. When the DBD device was driven by same voltages, the silver-coated inner electrode showed improved intensities and uniformities of up to 7.98 and 1.75 times, respectively. Moreover, the ROS intensities and uniformities were improved by up to 57.8 and 9.27 times, respectively.

Keywords: Dielectric barrier discharge, Image processing, Intensity, Silver mirror reaction, Uniformity