The Phase Discharge and Luminescence Area Characteristics of La_(0.5)Sr_(0.5)CoO_3 as a Cathode

摘要

La_(0.5)Sr_(0.5)CoO_3 was used as a cathode for the first time when a plasma display panel was used on a handheld personal computer. It has favorable sputtering resistance characteristics and stable discharge characteristics in gases. A cathode made of La_(0.5)Sr_(0.5)CoO_3 has unique electrical characteristics in early phase discharge voltage and luminescence characteristics. The discharge voltage and luminance continue to decrease from the starting value. The discharge and luminescence area shift of the La_(0.5)Sr_(0.5)CoO_3 were investigated by analysis of a DC plasma panel fabricated as a prototype. It is assumed that the shift in the discharge voltage and luminance are caused by a shift in the discharge and luminance area of the cathode surface, and that the shift of the current density is caused by the surface profile of the cathode particles. In order to elucidate this mechanism, a spherical model was applied to the discharge voltage shift, and the shift of the discharge voltage and luminance was simulated by applying this model to the measured values.