Eu²⁺-activated strontium-barium silicate: a positive solution for improving luminous efficacy and color uniformity of white light-emitting diodes

In this research we have studied the lighting enhancement method by analyzing chromatic performance and luminous flux of light emitting diodes that produce white light. In order to achieve expected results, it is necessary to mix Eu²⁺-activated strontium-barium silicate (SrBaSiO₄:Eu²⁺) with its phosphor compounding, which has been demonstrated to have considerable influence on lighting performance. The results showed that with the gradually increasing concentration of yellow-greenemitting SrBaSiO₄:Eu²⁺ phosphor in LEDs devices, at 8500 K, the color homogeneity and the lighting output received a great improvement. The color quality scale, on the other hand, responded negatively to the increase in SrBaSiO₄:Eu²⁺. The impact of SrBaSiO₄:Eu²⁺ on optical properties of WLEDs was confirmed. The final step to optimize SrBaSiO₄:Eu²⁺ usage in lighting development is to figure out a suitable amount of particles and optimize their size.