Preparation and properties of crystallization-induced high purity phosphor for LED

The lack of red light components in solid-state lighting technology urgently requires the development of new efficient red phosphor. Therefore, Eu3+-doped SrO-TiO2-P2O5 glass was prepared by high-temperature melt water quenching, and high-purity red phosphor was prepared successfully by crystallization induction. After crystallization, XRD shows that the precipitated crystal phases of phosphor are Sr3P4O13 and TiP2O7. The phosphor emits red fluorescence at 613 nm under the excitation wavelength of 394 nm, and the luminous intensity is about 58 times higher than the glass without crystallization. The color coordinates of CIE1931 are about (0.6304, 0.3693) and a color purity of 89.11%. Therefore, these results show that the prepared phosphor has great potential as red phosphor for white light emitting diodes.