Abstract:
XPS analysis is used to determine the percentage of Ce
3+ in YAG:Ce
3+ phosphor as a semi-quantitative method. In order to confirm the relationship between the luminescence and the percentage of Ce
3+ more clearly, a series of YAG:Ce
3+ phosphors were prepared under different sintering atmospheres. The results indicate that the relative percentages of Ce
3+(
fCe3+, estimated as peak area of Ce
3+ to Ce
3++Ce
4+) are 88.46%, 77.55%, 75.33% and 68.14%, respectively, corresponding to CO + N
2、CO、N
2 and air atmosphere by means of peak separation and fitting. The emission intensity of YAG:Ce
3+ phosphor increased significantly with increasing Ce
3+ concentration.