中文摘要：

室温条件下测定了Ba（Y1-xCe）2Si3O10（x=0．05，0．07，0．09）的漫反射吸收光谱、光声振幅谱和光声相位谱．由于高浓度掺杂使得ce3＋与ce3＋之间发生有效能量传递，从而导致Ba（Y1-xCe）2Si3O10（x=0．05，0．07，0．09）的漫反射吸收光谱强度依次降低，光声光谱强度依次增大．利用光声振幅谱结合相位谱的方法研究发光效率随掺杂浓度的变化，发现Ba（Y1-xCe）2Si3O10（x=0．05，0．07，0．09）3种不同掺杂浓度试样的发光效率依次降低．

英文摘要：

The diffuse reflection absorption spectra, photoacoustic amplitude spectrum and photoacoustic phase spectrum of Ba（Y1-xCe）2Si3O10 （x = O. 05, O. 07,0.09 ） were measured at room temperature. The effective energy transmission between Ce3＋ , which attributed to the high concentration doping of Ce3 ＋ , led to the inten- sities of the diffuse absorption spectra decreased and the intensities of photoacoustic amplitude spectrum in- creased gradually with increasing doping density. Moreover, Ba（Y1-xCe）2Si3O10（ x = 0. 05,0. 07,0. 09 ） samples with three different doping density （x = 0. 05 ,0. 07 ,0. 09 ） were experimented by using a new method of combining photoacoustic amplitude and phase information, and the results revealed that the luminous effi- ciencies of the samples decreased with increasing doping density.