Abstract
The relative luminescent intensity, I, and the absolute value of the decay time, τ, were determined for the green emission of phosphors doped with Li, Ni, and Cu. It was found that doping with Li has practically no influence on these parameters, but that Cu and Ni doping reduced I, and Ni also reduced τ. The spectrum, the temperature dependence of I, and the surface conductivity were also measured. Results are discussed on the basis of a model for phosphors.

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