Синтез и спектральные свойства новых люминофоров Ca2La6.8Eu1.2(XO4)6O2-δ (X = Si, W), полученных методом анионного замещения

Abstract

New red-emitting phosphors Ca2La6,8Eu1,2Si6-xWxO26+x-δ (x=0; 0,1; 0,2; 0,3; 0,4) have been synthesized by a citrate-nitrate solutions combustion method, characterized by powder X-ray diffraction and studied by optical spectroscopy techniques. The results showed that the fluorescence quantum yield depends on the annealing temperature and powders compressibility of the samples. Furthermore, shift absorption bands of optical centers influence on integrated emission intensity.