Luminescence properties of Dy3+-doped Li2SrSiO4 for NUV-excited white LEDs
2011; Elsevier BV; Volume: 33; Issue: 11 Linguagem: Inglês
10.1016/j.optmat.2011.06.018
ISSN1873-1252
AutoresPanli You, Guangfu Yin, Xianchun Chen, Bo Yue, Zhongbing Huang, Xiaoming Liao, Yadong Yao,
Tópico(s)Glass properties and applications
ResumoA series of single-phase full color phosphors, Dy3+-doped Li2SrSiO4 was synthesized by a solid-state reaction method. The phase of the as-prepared powders was measured by X-ray diffraction pattern (XRD) and the chemical composition was characterized using energy dispersive spectroscopy (EDS). The luminescent properties of Li2SrSiO4:Dy3+ were systematically investigated by concentration quenching, decay behavior and thermal stability measurements. The results suggested that the emission intensity of the Li2SrSiO4:Dy3+ was much stronger than that of Li2SrSiO4:Eu2+. It was worth to mention that Li2SrSiO4:Dy3+ phosphor possessed excellent thermal stability for use in light-emitting diodes (LEDs) and the emission intensity measured at 300 °C was only decreased 8% comparing with that measured at room temperature. Furthermore, the Commission International del'Eclairage (CIE) chromaticity coordinates of Li2SrSiO4:Dy3+ moved toward the ideal white light coordinates (0.33, 0.33). All results demonstrated that Li2SrSiO4:Dy3+ might be a potential phosphor for NUV-based white light-emitting diodes.
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