On the relationship between the optical characteristics of electroluminescence and the structure properties of ZnS:Cu

Conclusions Heat treatment of ZnSCu powder electroluminescent phosphors at a constant activator concentration affects the phase transition -ZnS -ZnS, which takes place through an intermediate phase. The amount of the intermediate phase depends on both the annealing temperature and time as well as on the rate of cooling.The electroluminescence spectrum of ZnSCu at a constant activator concentration depends on the annealing temperature and time and the rate of cooling and is correlated with the structure of the phosphor and the activation energy for the diffusion of copper in ZnS.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii Fizika, No. 6, pp. 22–25, June, 1971.