SrCaO Protective Layer for High-Efficiency PDPs

Discharge Characteristics of Plasma Display Panels with SrCaO Protective Layer Manufactured Using “All-in-Vacuum” Process

“…The V f1 and V s max of the SrCaO-PDP were 52 and 36 V lower than those of the MgO-PDP, respectively. The discharge voltage of the "all-in-vacuum" SrCaO-PDP was comparable with that of the SrCaO-PDP sealed in nitrogen gas 7) and with as-deposited raw SrCaO. 5) It is concluded that both the "all-in-vacuum" method and the nitrogen-sealing method are effective in decreasing the firing voltage of the SrCaO-PDP.…”

“…3) A high-£ protective layer such as SrO,46) SrCaO, 4,5,7) or CaO 8) is then used to reduce the firing voltage. The problem is that these materials are highly reactive with H 2 O and CO 2 , and in the conventional manufacturing process, the protective layer, deposited in a vacuum chamber, is exposed to an air atmosphere.…”

Lowering of the firing voltage and reducing of the discharge delay time in alternating current plasma display panels by a discontinuous spin-coated LaB6 film on the MgO protective layer

“…[12][13][14] Recently, our group has investigated the discharge characteristics of electron-beam evaporated LaB 6 thin film coated on a dielectric layer. 15 As an excellent cathode material with low work function (2.3∼3.2 eV), low resistivity and low sputtering yield, LaB 6 thin film presented much lower firing voltages and shorter discharge delay time than pure MgO film.…”

The role of a diffusion barrier in plasma display panel with the high gamma cathode layer

“…In a recent research, which used a mixture of SrO and CaO, the luminous efficacy almost doubledwith a Ne-Xe 30% content gas compared to that of a panel using the conventional MgO employing NeXe 10%. 4 However, the panel assembly fabrication process needed to be carried out in either a nitrogen gas atmosphere or in a vacuum. Another method which does not require a special sealing process but still allows the use of the high gamma property of SrO or CaO had been suggested.…”

“…MgO has been one of the most widely used cathode materials; however, it has limitations because of the large band gap energy of about 7 eV, too large to induce the secondary electron emissions through the Auger neutralization process using Xe ions. [2][3][4] There have been many attempts to apply other alkaline earth metal oxides such as SrO and CaO, which have a lower band gap energy and, therefore, a higher secondary electron emission coefficient for Xe ions when compared to MgO. 5,6 However, these materials have limitations when applied to PDP using the normal fabrication process, since they are very unstable and highly reactive with H 2 O or CO 2 , resulting in the formation of hydroxides or carbonates when exposed to air.…”