PDP용 녹색 형광체의 광 특성 개선에 관한 연구

초록

Plasma Display Panels(PDPs) require to have improved luminous efficiency, low manufacturing cost, and high image quality to compete with other flat display devices such as Liquid Crystal Displays(LCDs) and organic lightemitting diodes(OLEDs). In addition, the diversity of product line-up may be needed for high market share. In this paper, the optical characteristics of typical green phosphor for PDP application are reviewed and the problem-based solution will be proposed. We also shortly describe the principle of 3D-PDPs which are promising. Then, the requirement of green phosphor for 3D-PDP application is summarized and research achievement, as of now, is described. The typical problems of Zn2SiO4:Mn phosphor, which is the most well-known, are the negatively charged surface property and the long decay time, which leads to unstable discharge in green cell and afterimage. These problems were solved by coating the phosphor surface with metallic oxide. It was found that Al2O3 would be the best material for Zn2SiO4:Mnphosphor. It gives longevity as well as low operating voltage due to the charging effect in green cells. Also, new phosphors, (Y, Gd)Al3(BO3)4:Tb and (Mg, Zn)Al2O4:Mn phosphor are proposed for increasing the luminance and reducing the decay time, which are capable to apply for 3D-PDP application.

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