期刊
JOURNAL OF LUMINESCENCE
卷 179, 期 -, 页码 35-39出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2016.06.050
关键词
Molybdate; Thermal quenching; Quantum yield; Color coordinate; Luminous efficacy
类别
A polycrystalline Eu2Mo4O15 phosphor sample was prepared by high temperature solid state reaction. Phase purity and morphological features of the phosphor were investigated by X-ray diffraction and scanning electron microscopy, respectively. Reflectance spectra showed that the optical band gap of Eu2Mo4O15 is 2.95 eV. Phosphor emits intensive red light when excited with 394 and 465 nm radiation. Temperature dependent emission and luminescence lifetime measurements revealed that external and internal quantum yields decrease at the same rate and that luminescence quenches due to photo ionization. The calculated external quantum yields for 394 and 465 nm excitation were 7.8% and 53.5%, respectively. (C) 2016 Elsevier B.V. All rights reserved.
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