A single-phase, color-tunable, broadband-excited white light-emitting phosphor Y2WO6: Sm3+

Un-doped and Sm3+ doped Y2WO6 were synthesized with solid state reactions. X-ray diffraction measurements show that all the samples present single-phase Y2WO6. The combination of blue emission in a broad band from the host and several groups of emission lines in yellow, orange, and red spectral region results in a desired white light. The chromaticity coordinates and color temperature can be tuned by changing the doping concentration of Sm3+. The mechanisms of energy transfer were analyzed. The present results prove Sm3+ doped Y2WO6 is a promising single-phase, color-tunable, broadband-excited white light-emitting phosphor based on AlGaN-based ultraviolet light-emitting diodes.