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采用高温固相法制备了Sr3SiO5:Eu3+材料。测量了Sr3SiO5:Eu3+材料的激发与发射光谱:材料的发射光谱由576、585、611、618nm和650nm几个发射峰组成,分别对应于Eu3+的5D0→7F0、5D0→7F1、5D0→7F2、5D0→7F2和5D0→7F3辐射跃迁。监测618nm主发射峰时所得激发光谱为一多峰宽谱,主峰分别为400nm和470nm。研究了Eu3+浓度对Sr3SiO5:Eu3+材料发光强度的影响,结果显示:随Eu3+浓度的增大,发光强度先增大后减小,Eu3+的摩尔分数为3%时,材料的发光强度最大,根据Dexter理论,其浓度猝灭机理为电偶极-偶极跃迁。引入电荷补偿剂Cl-、Li+、Na+和K+时,材料的发光强度均得到了提高,其中Cl-和Li+的提高幅度较明显。
Sr3SiO5: Eu3 + was prepared by solid state reaction at high temperature. The excitation and emission spectra of Sr3SiO5: Eu3 + were measured. The emission spectra of the material were composed of several emission peaks of 576, 585, 611, 618 nm and 650 nm respectively corresponding to 5D0 → 7F0, 5D0 → 7F1, 5D0 → 7F2 and 5D0 → 7F2 and 5D0 → 7F3 radiation transitions. The excitation spectrum obtained when monitoring the main emission peak at 618 nm is a multimodal broad spectrum with main peaks of 400 nm and 470 nm, respectively. The effect of Eu3 + concentration on the luminescence intensity of Sr3SiO5: Eu3 + was studied. The results showed that the luminescence intensity first increased and then decreased with the increase of Eu3 + concentration. The luminescence intensity of Eu3 + was the highest when the molar fraction of Eu3 + was 3%. According to Dexter Theory, its concentration quenching mechanism is dipole - dipole transition. When the charge compensation agents Cl-, Li +, Na + and K + are introduced, the luminescence intensity of the material is improved, and the improvement of Cl- and Li + is obvious.