PLASMA DISPLAY PANEL

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A material suitable for improving the coefficient of secondary-electron emission of PDPs (Plasma Display Panel) is provided to thereby enable a PDP to operate at a higher efficiency. Provided is a PDP (200) which includes a protective layer (7) constituted of MgO and an electron-emitting layer (20) formed on the protective layer (7), the electron-emitting layer (20) comprising electron-emitting particles constituted of a crystalline compound that have been spread on the protective layer (7). The electron-emitting particles are a crystalline compound comprising as major components : one or more elements selected from calcium, strontium, barium, and rare-earth metals; indium; and oxygen.