Influence of Impurities on the Luminescence Quantum Efficiency of ( La , Ce , Tb ) PO 4

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1993Publisher:The Electrochemical SocietyJournal:Journal of The Electrochemical Society, volume 140, pages 216-222 (issn: 0013-4651, eissn: 1945-7111,

Authors: S. Lizzo; W. van Schaik; G. Blasse; W.M.A. Smit;

doi: 10.1149/1.2056091

Influence of Impurities on the Luminescence Quantum Efficiency of ( La , Ce , Tb ) PO 4

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Abstract

The influence of impurities on the luminescence quantum efficiency of La 0.75 Ce 0.25 PO 4 and La 0.85 Tb 0.15 PO 4 has been studied. The transition metal ions Fe and Mn are not built into the LaPO 4 lattice under a reducing firing atmosphere. Trevalent Ce 4+ is probably present in a second phase. Codoping with cations with different valencies has no influence on the Ce 4+ amount nor on the Ce 3+ quantum efficiency

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