Effects of Zn-doping on red-luminescence in Eu-doped (Mg,Ca)S phosphor films
2005
Abstract For the improvement of emission efficiency, ZnS-doped Mg 0.8 Ca 0.2 S:Eu phosphor film was made using rf-magnetron sputtering method. When the concentration of ZnS in the film is 4%, the photoluminescence intensity is about three times higher than that of ZnS-non-doped Mg 0.8 Ca 0.2 S:Eu film with keeping pure red emission (∼650 nm). The crystal planes are oriented in (2 0 0) direction and make a solid solution with ZnS. Enhancement in photoluminescence (PL) intensity is closely related to the change of the crystal quality.
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