Cathode ray excitation of X2–Y2SiO5:Eu3+ results in a moderate red emission. The efficiency is enhanced considerably (≈ 700%) by the simultaneous introduction of a high Tb3+ concentration (e.g. YTbSiO5:Eu3+). An enhancement of the photoluminescence emission is observed as well. The luminescence properties are studied as a function of the Tb3+ content. The mechanism of energy transfer in cathodo- and photoluminescence are discussed.
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Stiebler et al. (1990) studied this question.
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