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采用固相法制备了LiBaBO3:Eu3+材料,并研究它的发光特性。LiBaBO3:Eu3+材料的主发射峰位于594、613、651nm和686nm,分别对应Eu3+的5D0→7F1、5D0→7F2、5D0→7F3和5D0→7F4跃迁;监测613nm发射峰,对应的激发光谱主峰为260、329、368、400nm和470nm。研究了Eu3+含量对LiBaBO3:Eu3+材料发射强度的影响,结果表明:随Eu3+含量的增大,发射强度先增大后减小,Eu3+摩尔分数为3%时,发射强度最大,依据Dexter理论知浓度猝灭机理为偶极-偶极相互作用。掺入电荷补偿剂Li+、Na+和K+均提高了LiBaBO3:Eu3+材料的发射强度。
LiBaBO3: Eu3 + was prepared by solid state reaction and its luminescent properties were studied. The main emission peaks of LiBaBO3: Eu3 + are located at 594,613,651nm and 686nm, which correspond to the 5D0 → 7F1, 5D0 → 7F2, 5D0 → 7F3 and 5D0 → 7F4 transitions of Eu3 + respectively. The emission peak at 613nm is monitored and the corresponding peak of excitation spectrum is 260 , 329, 368, 400 nm and 470 nm. The effect of Eu3 + on the emission intensity of LiBaBO3: Eu3 + was studied. The results show that the emission intensity first increases and then decreases with the increase of Eu3 + content. When the Eu3 + molar fraction is 3%, the emission intensity is the largest. According to Dexter theory, The quenching mechanism is dipole-dipole interaction. Incorporation of charge compensators Li +, Na + and K + all increased the emission intensity of LiBaBO3: Eu3 +.