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以激发光谱和发光光谱研究了Ce~(3+)在LnOX中的发光。光谱表明当X相同而Ln不同时,谱图上Ce~(3+)峰的位置只有较小的移动;而X不同时Ce~(3+)峰的位置有明显和有规律地移动,即按照Cl——Br——I次序往长波方向移动,这个次序与X的电负性减小的次序是一致的。还可以看到Ln=La时与Ln=Gd或Y时有差别,而且Ln=La时stokes位移较大,从离子半径角度对这些进行了讨论。
The luminescence of Ce ~ (3+) in LnOX was investigated by excitation and emission spectroscopy. The spectra show that when X is the same and Ln is different, the position of the Ce ~ (3+) peak in the spectrum has only a small movement, while the position of the Ce ~ (3+) peak in the spectrum moves obviously and regularly, that is, According to the Cl - Br - I order to the longwave direction, this order is consistent with the decreasing order of the electronegativity of X. It can also be seen that there is a difference between Ln = La and Ln = Gd or Y when Ln = La, and the larger the Stokes shift when Ln = La, these are discussed from the ion radius perspective.