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采用高温固相法合成了LiBaB9O15:Eu3+红色荧光粉,研究了荧光粉的发光性能。结果表明:发射光谱主峰位于618nm,对应于Eu3+的5D0→7F2电偶极跃迁;Eu3+部分取代Ba2+进入晶格,占据非反演对称中心的格位;激发光谱两个主峰位于400nm和470nm,表明它可以作为蓝+黄模式白光发光二极管(white light-emitting diode,W-LED)的红色补光粉和紫外发光二极管(ultraviolet-light-emitting diode,UV-LED)激发三基色荧光粉体系中的红色荧光粉。研究了Eu3+浓度和电荷补偿剂对发射光谱的影响,结果显示:随着Eu3+浓度增加,发光强度增强,未发现浓度猝灭现象。电荷补偿离子Cl-、Na+和K+均能提高样品的发光强度,其中掺入K+的样品发光强度最高,提高了约40%。
LiBaB9O15: Eu3 + red phosphor was synthesized by solid-state reaction at high temperature. The luminescent properties of the phosphor were studied. The results show that the main emission peak is located at 618nm, which corresponds to the 5D0 → 7F2 dipole transition of Eu3 +. The Eu3 + partially replaces Ba2 + into the lattice and occupies the lattice sites of the non-inversion symmetry center. The two main peaks of the excitation spectrum are located at 400nm and 470nm, It can excite the phosphors in the trichromatic phosphor system as the red light and the ultraviolet-light-emitting diode (UV-LED) of the blue and yellow mode white light emitting diode (W-LED) Red phosphor. The effects of Eu3 + concentration and charge compensation agent on the emission spectra were studied. The results showed that with the increase of Eu3 + concentration, the luminescence intensity was enhanced and no quenching of concentration was found. Charge-compensated ions Cl-, Na + and K + can improve the luminescence intensity of the sample. The K + -doped sample has the highest luminescence intensity, which is increased by about 40%.