title: Solid-state synthesis and luminescent properties of yellow-emitting phosphor NaY(MoO4)2:Dy3+ for white light-emitting diodes.
abstract: A yellow-emitting phosphor NaY(MoO4)2:Dy(3+) was synthesized using a solid-state reaction at 550 °C for 4 h, and its luminescent properties were investigated. Its phase formation was studied using X-ray powder diffraction analysis, and there were no crystalline phases other than NaY(MoO4)2. NaY(MoO4)2:Dy(3+) produced yellow emission under 386 or 453 nm excitation, and the prominent luminescence was yellow (575 nm) due to the (4) F9/2 → (6) H13/2 transition of Dy(3+). For the 575 nm emission, the excitation spectrum had one broad band and some narrow peaks; the peaks were located at 290, 351, 365, 386, 426, 453 and 474 nm. Emission intensities were influenced by the Dy(3+) doping content and a concentration quenching effect was observed; the phenomenon was also proved by the decay curves. Moreover, the Commission International de I'Eclairage chromaticity coordinates of NaY(MoO4)2:Dy(3+) showed similar values at different Dy(3+) concentrations, and were located in the yellow region.
authors: College of Physics Science & Technology, Hebei University, Baoding, 071002, People's Republic of China.
authors: Zhijun
authors: Z
authors: Wang
authors: College of Physics Science & Technology, Hebei University, Baoding, 071002, People's Republic of China.
authors: Panlai
authors: P
authors: Li
authors: College of Physics Science & Technology, Hebei University, Baoding, 071002, People's Republic of China.
authors: Qinglin
authors: Q
authors: Guo
authors: College of Physics Science & Technology, Hebei University, Baoding, 071002, People's Republic of China.
authors: Zhiping
authors: Z
authors: Yang
mesh_terms: D060326:Chemistry Techniques, Synthetic; D004419:Dysprosium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods
chemical_list: D049408:Luminescent Agents; D004419:Dysprosium
keywords: NaY(MoO4)2:Dy3+; luminescence; phosphors; white LEDs