활성제 Cu2+ 및 Mn2+ 도핑농도에 따른 ZnS:Mn,Cu,Cl형광체의 광학적 특성
The optical properties dependent on different doping concentrationsof activators Cu2+ and Mn2+ in ZnS:Mn,Cu,Cl phosphor
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Abstract
Manganese, copper and chlorine-doped ZnS phosphors (ZnS:Mn,Cu,Cl) were synthesized through solid-state reaction. Manganese was added in the range of amount 1.4~5.3mol % to ZnS phosphors containing 0.2 or 1.0mol % of copper and a small amount of chlorine. As-synthesized phosphors showed a spherical morphology with a mean size of ~20m and structural properties of Wurtzite, which were identified by SEM and XRD, respectively. Optical properties of ZnS:Mn,Cu,Cl synthesized with various concentrations of activators were analysed by both of PL and EL spectra. Samples mainly showing only 580nm-orange emission by 380nm-UV excitation gave different EL spectra of blue, green, and orange emissions at 450, 480 and 580nm, respectively, depending on concentrations of Cu2+ and Mn2+.
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