We have studied the photophysics of a Zn(Cd)S:Ag phosphor, in powder form under ambient conditions, over a time domain extending from picoseconds to milliseconds. Pulsed laser luminescence techniques and timehyphen;resolved dielectric loss spectrometry have been employed. We propose mechanisms to interpret the results and complement the proposals with a computer simulation. We discuss the implications of the results for energy conversion schemes involving photoassisted catalysis.
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