Shinya Fukuta

25.2: Analysis of Deterioration of BaMgAl10O17:Eu2+ Phosphor for Plasma Display Panels

Using TEM, we studied the amorphous phase on a BaMgAl10O17:Eu2+ phosphor surface deteriorated by VUV irradiation. This paper describes growth of the amorphous phase and shows that irradiation from the a-axis of the phosphor crystal intensively increased the growth of the amorphous phase, compared with the results of irradiation from the c-axis.

Study of the effect of water on thermal and operating degradation of BaMgAl10O17: Eu2+ (BAM) blue phosphor

— From the adsorption and desorption characteristics of water, we showed that water can intercalate into BaMgAl10O17: Eu2+ blue phosphor. ESR, XANES, and XPS analyses confirmed that oxidation by water causes thermal degradation of BAM. We also demonstrated that intercalated water accelerates luminance degradation under VUV irradiation and showed oxidation of Eu2+ during panel operation by means of μ-XPS. We concluded that the cause of thermal and operating degradation of BAM is the oxidation of Eu2+ due to water.

42.2: Distinguished Paper: Effect of Water on Thermal and Operating Degradation of BaMgAl10O17:Eu2+ (BAM) Blue Phosphor

XANES and XPS analyses reconfirmed that oxidation by water causes thermal degradation of BaMgAl10O17:Eu2+ blue phosphor. We also confirmed that its operating degradation is due to photochemical reactions between Eu ions and water molecules under VUV irradiation.

Fully plated metal electrodes for plasma-display panels

We investigated the feasibility of employing a full-plating processes for the metal electrodes in PDPs. Using deposition with a full-plating process, we succeeded in fabricating copper electrodes with a thicknesses of over 10 μm. Moreover, we fabricated and operated panels with fully plated bus electrodes. These plating processes seem to hold promise in the simultaneous pursuit of metal electrodes with the highest conductance and lower costs.