Synthesis and luminescent properties of Ba3Y3.88Gd0.12O9∶Eu3+phosphors with enhanced red emission

• 作者: Guiyuan Liu Bin Liu Jinkai Li Zongming Liu
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2022,（4）
• 所属期刊栏目: SPECTROSCOPY,LUMINESCENCE AND PHOSPHORS
• 页码范围: 534-540
• 页数: 7页
• 语种: 英文

摘要

In this work,the Gd3+/Eu3+activated Ba3Y4O9(BYO)phosphors were successfully synthesized via coprecipitation method at 1400℃.The precursor composition,crystal structure stability,microscopic morphology,photoluminescence(PL)/photoluminescence excitation(PLE)spectra and fluorescence attenuation analysis of the phosphors are discussed in detail.The chemical composition of the precursor was determined by Fourier transform infrared spectroscopy(FT-IR)and thermogravimetry(TG)analysis;According to field emission-scanning electron microscopy(FE-SEM)analysis,it is found that the particle size of phosphor is uniform and the agglomeration is few.According to PL/PLE spectra analysis,Ba3Y3.28Eu0.6Gd0.12O9 phosphors has the strongest excitation band at 260 nm and the strongest emission band at 614 nm,and the fluorescence intensity of Ba3Y3.28Eu0.6Gd0.12O9 is higher than that of Ba3Y3.4Eu0.6O9.The quenching concentration of Eu3+in Ba3Y3.88-4xEu4xGd0.12O9 phosphors is x=0.15 and the mechanism of quenching concentration of Eu3+is electric dipole-quadrupole type interactions.The lifetime value of Ba3Y3.88-4xEu4xGd0.12O9(x=0.15)phosphors is 0.686 ms and decreases with the in-crease of Eu3+content.In addition,the CIE chromaticity diagram of Ba3Y3.28Eu0.6Gd0.12O9 phosphors is(0.66,0.34).Finally,the lamp beads assembled with Ba3Y3.28Eu0.6Gd0.12O9 phosphors have an ideal lu-minous effect.Therefore,the Ba3Y3.88-4xEu4xGd0.12O9 phosphors designed in this work may hopefully meet the requirements of various lighting and optical display applications.