| Effect of Introduction of Lu on Thermal Stability and
Luminescence Properties of YAG:Ce3+,Sm3+ Using
Orthogonal Experiments |
Guozhen Li,a, b Liping Lua, b, * and Haiying Suna, b
Pages : 12-18
DOI : 10.1080/0371750X.2020.1857308 |
| Abstract |
| Y(Lu)AG:Ce3+,Sm3+ yellow phosphors were prepared by molten salt method with
0.1NaCl-0.1KCl-0.8NaF as the molten salt. The effects of multi-factor variables on the
properties of Y(Lu)AG:Ce3+,Sm3+ phosphors were comprehensively studied by
orthogonal experiments which is a method to study the experiment with multi-factor
variables and select some representative ones from the comprehensive experiment
to find the optimal experimental conditions. The optimum synthesis conditions were
as follows: Ce3+ concentration 0.06 mol%, Lu3+ concentration 0.5 mol%, Sm3+
concentration 0.02 mol%, calcination temperature 1300oC, insulation time 1.5 h. The
effects of introduction of Lu3+ on the crystal structure, temperature stability and
luminescence properties of YAG:Ce3+,Sm3+ were studied. The results showed that due
to the introduction of Lu3+ ions, the matrix lattice slightly changed (belonging to the
cubic crystal system), the emission peak was blue shifted, temperature stability
improved and decay reduced, which plays an important role in improving the lifetime
of white LEDs. |
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