Dy3+ doped LiYF4 crystals for UV excited white light emitting diodes

A Dy3+-doped LiYF4 single crystal capable of generating white light by simultaneous blue and yellow light emission of phosphorescent centers is produced. Chromaticity coordinates and photoluminescence intensity vary with excitation wavelength. Under 350, 365, and 388 nm excitation, the crystal shows excellent white light emission. The most efficient wavelength for white light is 388 nm. The CIE coordinates are x=0.316 and y =0.321, and the color temperature (Tc) is 6 368 K. These results indicat