A Potential Candidate for Lamp Phosphor: Eu3+Activated K2Y2B2O7

[摘要] The novel phosphor K2Y2B2O7doped with europium is studied for its photoluminescence properties. The studies show that the phosphor gives strong red emission (PL) at 613 nm related to5D0-7F2transition of Eu3+under the 260 nm excitation (PLE) related to the charge transfer (CT) from the 2p orbital of the O2−ions to the 4f orbital of Eu3+ions with CIE coordinates (x=0.675;y=0.324). The results of PL and PLE spectra indicate the applicability of K2Y2B2O7:Eu as a red component in lamp phosphor. The phosphor is characterized through XRD pattern analysis, and morphology is explained on the basis of SEM image. Optimum concentration of Eu3+required for the highest intensity of emission is also studied.

[学科分类] 光谱学