A new red colour emitting phosphor - ZnS: Mn co-doped with Ba for electroluminescent (EL) display devices
نویسندگان
چکیده
We prepared a new Mn activated ZnS phosphor co-doped with Ba that showed an interesting shift in the spectral emission from amber-yellow to red colour. We believe it to be an important result to understand the underlying Physics and for display devices. To realize this, attempts were made to fine tune the band gap of ZnS with various concentrations of Ba co-doping within the concentration range of 2.50 to 10 mol%. Upon the addition of Ba into the Mn activated host lattice of ZnS, a significant shift in the emission band from amber yellow (570nm) to red (620nm) was observed. Ba codoping in ZnS host was achieved by sintering BaSO4 with ZnS at 900C by carbothermal reduction method. Keywards: Phosphor, Zn(1-x)BaxS:Mn, Photoluminescence (PL), red emission.
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