【摘要】 研究了SrB4O7:Pr3+,LaB3O6:Pr3+及LaMgB5O10:Pr3+低温下的光谱．从发射谱上看这三种发光材料都可以产生光子级联发射,对照Pr3+离子的能级图对各发射峰进行了指认．因为硼酸盐体系中较高的声子振动能量导致了3P0和1D2能级间的无辐射弛豫,所以级联发射的第二步过程3P0→3HJ发光非常微弱或基本没有．在LaB3O6及LaMgB5O10的激发谱上除了4f5d吸收带外还观测到了Pr3+离子的3H4→1S0跃迁,由此在这两种材料中确定了Pr3+离子的1S0能级相对于最低的4f5d能级的位置．更多还原

【Abstract】 Low temperature spectra of SrB4O7:Pr3+, LaBaO6:Pr3+ and LaMgB5O10:Pr3+ were investigated by synchrotron radiation VUV light. Under VUV excitation, photon cascade emission was found in SrB4O7:Pr3+, LaB3O6:Pr3+ and LaMgB5O10:Pr3+. All peaks in emission spectra were assigned. Because high phonon energy in borates results in non-radiative relaxation between 3P0 and 1D2 states of Pr3+, the second step emission 3Po→3HJ is very low in SrB4O7:Pr3+ and even is absent in LaB3O6:Pr3+ and LaMgBsO10:Pr3+. In the excitation spectra of LaBaO6:Pr3+ and LaMgB5O10:Pr3+, along with the 4f5d absorption bands, a weak line due to 3H4→1S0 transition also was detected. Prom the position of 3 H4→1S0 transition, the energy difference of 1So state and the lowest 4f5d state was determined.更多还原