Key Words:Light emission;Calcium - Emission spectroscopy - Luminescence - Phosphates - Phosphors - Photoluminescence - Quenching - Scanning electron microscopy - Solid state reactions - X ray diffraction;Blue phosphors - Blue-emitting - Concentration quenching - Excitation and emission spectra - Luminescence properties - Optimal concentration - Photoluminescence properties - Solid state reaction method
Abstract:A series of new blue-emitting Ca<inf>2(1&nbsp;&minus;&nbsp;x)</inf>B<inf>2</inf>P<inf>2</inf>O<inf>10</inf>:2xEu²⁺(x&nbsp;=&nbsp;0.005, 0.010, 0.015, 0.020, 0.025, 0.030&nbsp;mol%) phosphors were synthesized by the solid state reaction method. The X-ray diffraction (XRD) and scanning electron microscope (SEM) were utilized to characterize the prepared samples. The luminescence properties of the phosphor were studied by excitation and emission spectra. The optimal concentration of Eu²⁺ions in Ca<inf>2</inf>B<inf>2</inf>P<inf>2</inf>O<inf>10</inf>was determined to be x&nbsp;=&nbsp;0.010&nbsp;mol%, and the concentration quenching mechanism was studied in detail. These results suggest that Ca<inf>2</inf>B<inf>2</inf>P<inf>2</inf>O<inf>10</inf>:Eu²⁺is a potential blue phosphor for application in WLEDs. &copy; 2016 Elsevier GmbH
Volume:127
Issue:20
Translation or Not:no