Synthesis of Rare Earth Doped with Tungstate and Phosphate Luminescent Materials and Its Adoption in Light-Emitting Diode

摘要

This research focuses on the fluorescent powder materials based on a single matrix of this type of LED. Taking Ba2CaWO6 as an example, mixing Dy3+ alone can produce blue and white light at 318nm UV excitation. At the same time, mixing Dy3+ with Eu3+ can make the fluorescent powders realize the emission of 491 nm/577 nm of Dy3+ and 588 nm of Eu3+. Dy3+ is set to 0.06 and the ratio of Eu3+ is adjusted to make the luminous color gradually close to white. In the study of Ba3Y(PO4)(3)center dot xDy(3+)center dot yEu(3+), x is set as 0.07, and the content of y is set as 0.01 similar to 0.08. Dy3+ alone will emit blue and white light under the laser at 391 nm. By increasing the content of Eu3+, polychromatic emission can be carried out, and white light can be obtained by adjusting the concentration of Eu3+. At the same time, the application functions of white LED packaging are tested for the above materials. The results show that both Ba2CaWO6 center dot xDy(3+)center dot yEu(3+) and Ba3Y(PO4)(3)center dot xDy(3+)center dot yEu(3+) materials can realize white lighting by adjusting the ratio of Eu3+center dot Dy3+, increasing the proportion of Eu3+ can improve the color rendering of white LED.