Effect of the order in which powdered ZnS is doped with copper chloride and indium on formation of luminescence centers

We consider the effect of the order in which In and CuCl impurities are added during thermal doping on the luminescence characteristics of ZnS, and also their role in formation of emission centers in zinc sulfide. We show that the order in which the impurities (acting as activators or coactivators) are added to the ZnS plays the determining role in formation of the spectral characteristics of the luminophore obtained. We have established that adding indium first during thermal doping of zinc sulfide with In and CuCl prevents diffusion of Cu into the interior of the ZnS. Adding indium after CuCl or adding indium simultaneously with CuCl prevents formation of the Cu2S and CuS phases or promotes degradation of the indicated phases in ZnS. __________ Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 73, No. 5, pp. 601–605, September–October, 2006.