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LiSrBO3:Tb3+ green phosphor was synthesized by means of a solid state reaction and its spectral characteristics were studied. The emission spectrum of LiSrBO3:Tb3+ consists of four major bands at 486, 544, 595 and 620 nm under the excitation of near ultraviolet irradiation, which are originated from the 5D4→7F6, 5D4→7F5, 5D4→7F4 and 5D4→7F3 characteristic transitions of Tb3+, respectively. Monitored at 544 nm, the excitation spectrum of the phosphor extends from 220 nm to 390 nm, with the excitation peaks centered at 242, 277, 368 and 381 nm, respectively. The effect of Tb3+ concentration on the emission intensity of LiSrBO3:Tb3+ was also investigated. The results show that firstly the intensity increases with increasing Tb3+ concentration, reaches a maximum value at 3%(molar fraction) Tb3+ and then decreases, showing a concentration self-quenching, whose mechanism is proposed as a d-d interaction based on Dexter theory. The emission intensity of LiSrBO3:Tb3+ was enhanced by co-doping Li+, Na+ and K+.
The emission spectrum of LiSrBO3: Tb3 + consists of four major bands at 486, 544, 595 and 620 nm under the excitation of near ultraviolet irradiation. LiSrBO3: Tb3 + green phosphor was synthesized by means of a solid state reaction and its spectral characteristics were studied. which are originated from the 5D4 → 7F6, 5D4 → 7F5, 5D4 → 7F4 and 5D4 → 7F3 characteristic transitions of Tb3 +, respectively. Monitored at 544 nm, the excitation spectrum of the phosphor extends from 220 nm to 390 nm, with the excitation peaks centered at 242, 277, 368 and 381 nm, respectively. The effect of Tb3 + concentration on the emission intensity of LiSrBO3: Tb3 + was also investigated. The results show that first the intensity increases with increasing Tb3 + concentration, reaches a maximum value at 3% (molar fraction) Tb3 + and then decreases, showing a concentration self-quenching, whose mechanism is proposed as a dd interaction based on Dexter theory. The emission intensity of LiSrBO3: Tb3 + was enhanced by co -doping Li +, Na + and K +.