Luminescent Characteristics of SrS:Cu,X Thin-Film Electroluminescent(TFEL) Deviecs depending on Coactivatiors

Luminescent characteristics of SrS:Cu,X TFeL devices fabricated by electron-beam deposition system were studied. The SrS powders were used as the host materials and Cu, or CuCl powders were added as the luminescent center. The emission spectra of the SrS:Cu,X TFEL devices strongly depended on coactivators. The luminance() and efficiency() of SrS: TFEL device were 1443 cd/ and 2.44 lm/w, respectively. Green color was observed from this TFEL device. The luminous efficiency of SrS: TFEL device was higher than that of ZnS:Tb TFEL device, and it also could be good green phosphors for TFEL devices. The luminance() and efficiency() of SrS:CuCl TFEL device were 262 cd/ and 0.26 lm/w, respectively. Blue color was emitted from this TFEL device.