Red electro-luminescence from ZnS:Mn-F thin film

Thin film EL device made of ZnS:TbF
₃
, Mn by means of electron beam evaporation yield red light (peak wave length 7000 Å) at a brightness of 60 Fl. The color of the light varied from orange to red according to the concentration ratio of TbF
₃
to Mn. Two emission bands were observed, namely at 5850 Å and 7000 Å. Since the orange band is obviously due to the localized center of Mn
²⁺
, our experimental results support that the red emission band is due to the localized center of Mn
²⁺
, our experimental results support that the red emission bands is due to the localized center of Mn-F.