Studies On Luminescence Characteristics Of Eu2⁺ Doned BaSi₂O₂N₂ And Spectral Similarity

This article aims to study BaSi₂O₂N₂:Eu²⁺.The study of enhanced fluorescence luminescence is carried out by co-doping Er³⁺,and the performance of Mechanoluminescence under low temperature is studied by the BaSi₂O₂N₂:Eu²⁺film.In addition,the finished phosphor and LED package components are spectrally similar.Degree of research.The specific content is as follows:(1)Whether the pure phase can be synthesized is an important factor affecting the luminescence performance of the material in the BaSi₂O₂N₂:Eu²⁺material system.On the one hand,the valence state of europium ions cannot be stably maintained at divalent during the material synthesis process,so that it can influence the content of the position that the rare earth ions enter crystal lattice and the final valence state;on the other hand,the intermediate products of BaSi₂O₂N₂:Eu²⁺will also affect the luminescence performance when adjusting the synthesis temperature of the material,such as silicates and other proportions of nitrogen oxides.To this phenomenon,we introduced a scheme of Er³⁺for synthesis control and adjustment of luminescence.This solution can realize the regulation of Eu²⁺and Eu³⁺,and enhance the number of the effective Eu2+luminescence center;the entry of Er³⁺into the control material week the preferential growth orientation during growth,and the solid-line luminescence effect has been enhances Significantly.(2)The luminescent materials used in damage detection are generally Mechanoluminescence materials.However,the current experimental research mainly focuses on room temperature environment.We are concerned that the actual use environment temperature may not be in this range.We have conducted property studies on the properties of luminescent materials at low temperatures.The BaSi₂O₂N₂:Eu²⁺material was made into a tape film,and the film was used as the basic sample.The trap's influence on the force-induced luminescence was analyzed under zero and low-temperature environments such as liquid nitrogen temperature.It has better response characteristics to force,and can respond under very weak force.Through comparative analysis with Sr Al₂O₄:Eu²⁺,Dy³⁺,it is believed that the traps of BaSi2O2N2:Eu2+can be read by force rather than in the afterglow.BaSi₂O₂N₂:Eu²⁺can be applied to low temperature scenarios that cannot be applied with Sr Al₂O₄:Eu²⁺,Dy³⁺.(3)In the case that the color rendering index(CRI-Ra)is inaccurate in the evaluation of LED lights.we introduce the method of measuring the degree of spectral similarity,and collected the spectrum for several typical LED chips packaged for lighting to analysis of the measurement of similarity.In order to reflect whether the LED can reflect the difference between the LED and the target solar spectrum,a sample chip with a certain difference is selected.By comparing the difference between the two spectrums in the same picture,and comparing the calculated values under the similarity,it is considered that this kind of from the spectrum.It is feasible to use the method of angle measurement in evaluation.Comparing several similarity calculation values,it is believed that the calculation method of comparing the similarity of the spectral curve can reflect the similarity of the spectrum more than the commonly used correlation coefficient.