Abstract
Red light emitting electroluminescent phosphors in the (Zn,Cd) (S,Se):Cu system were investigated. The best red electroluminescent phosphor is obtained by firing (0.9Zn,0.1Cd) (0.1S,0.9Se) adding Cu, and the same coactivator concentration at 1000° ∼ 1100°C. Electroluminescent and photoluminescent properties of phosphors of various composition were interpreted by curves illustrating the energy level variation with composition in solid solution, which is obtained by considering nearest‐neighbor effects, and a temperature quenching factor in electroluminescence. From similar considerations, the variation of luminescent properties of phosphors of given composition, containing given luminescent centers, can be predicted, and the critical frequency of excitation when developing electroluminescent phosphors of a given color is presented.
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