A New Yellowish-Green-Emitting Phosphor: Eu 2+ -Doped K 4 CaSi 3 O 9 . -The title phosphor is prepared by solid state reaction of a stoichiometric mixture of K2CO3, CaCO3, SiO2, and Eu2O3 with 1.0-5.0 mol% Eu 2+ (850°C for 10 h and 950°C for 10 h mixed with active carbon). The samples are characterized by powder XRD and photoluminescence spectroscopy. The phosphor exhibits bright yellowish-green luminescence under UV and near UV excitation and excellent thermal stability on temperature quenching. - (YUAN, B.;…
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