ZnS series electrolum inescence have obtained extensive applications in low brightness illuminance

LCD

automobile and aircraft instrument etc.ZnSas electrolum inescence material is always doped with Mn and Cu.Mn

2+

ions form luminescent center of orange color emission with wavelength about 580 nm in the crystal

Cu

+

ions form not only luminescent center

but also Cu

x

S which is indispensable to luminescence.Accordingly Mn and Cu have obvious influence on luminescence brightness.Due to the doping with more Mn in ZnS:Cu

Mn orange electroluminescence material

the excess of Mn will influence on internal structure of ZnS;and some else compounds of Mn would likely bring adverse influence on the brightness of electrolum inescent material in burn process

which induce the brightness of electrolum inescent material far lower than blue or green materials.In this paper

doping with proper compounds of Mn or Cu in annealing process

with the method of diffusion at low temperature

it make Mn

2+

enter crystal lattice of ZnS evenly

and obtained ZnSCu Mn ACEL powder material with higher brightness.The influences of content of Cu and Mn

categories of compound of doping Mn

and annealing temperature on luminescence brightness were discussed.The experimental results showed that among three categories compound of Mn(carbonic acid manganese

acetic manganese

vitriol manganese)

the material with acetic manganese as dopant exhibits the maximal brightness.Materials with highest brightness by this preparation were obtained at annealing temperature of 700℃ and doping dose of Mn(acetic manganese as dopant) at 2%

and Cu at 0.1%.The brightness of the material doped with Mn is twice as higher as that of general material annealing at low temperature.