Acta Photonica Sinica, Volume. 49, Issue 3, 0316003(2020)
Luminescent Properties and Energy Transfer of Er3+, Cr3+ Co-doped BaAl2Si2O8 Phosphors
BaAl2Si2O8:Cr3+, Er3+ series phosphors were synthesized by high-temperature solid-phase method. The effects of Cr3+ and Er3+ doping on the light-emitting properties of BaAl2Si2O8 materials were studied. The BaAl2Si2O8:Er3+ fluorescence sample exhibited only green fluorescence with a peak value of 550 nm at an excitation wavelength of 393 nm, which is derived from the superposition of 2H11/2→4I15/2 and 4S3/2→4I15/2 transitions. The BaAl2Si2O8:Cr3+ fluorescence sample exhibits red fluorescence with a peak value of 694 nm at an excitation wavelength of 550 nm, which is derived from the 2E→4A2 transition. In the co-doped samples BaAl2Si2O8:Cr3+, Er3+, 380 nm is used as the excitation light at the groove of the Cr3+ excitation peak, and the obtained emission peaks include not only the emission peak position of Er3+, but also the emission peak position of Cr3+, which indicates that there may be radiant energy transfer between them; the fluorescence spectra of the co-doped BaAl2Si2O8:1% Cr3+, x% Er3+ samples were tested. With the increase of x, the intensity of the excitation and emission spectra of Cr3+ increased, and when x=0.5, the spectral intensity is 4 times the original. In addition, when the concentration of Cr3+ is fixed, the fluorescence lifetime of Cr3+ gradually increases as the concentration of Er3+ increases; when the concentration of Er3+ is fixed, the fluorescence lifetime of Er3+ decreases gradually as the concentration of Cr3+ increases. These phenomena indicate the existence of resonance energy transfer between Er3+ and Cr3+. The critical energy distance between Er3+ and Cr3+ is 4.5 nm, which is an electric dipole-dipole (d-d) interaction.
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Lan-lan SUN, [in Chinese], Qing-ling WANG, Jiu-yang HE, [in Chinese]. Luminescent Properties and Energy Transfer of Er3+, Cr3+ Co-doped BaAl2Si2O8 Phosphors[J]. Acta Photonica Sinica, 2020, 49(3): 0316003
Category: Materials
Received: Nov. 19, 2019
Accepted: Jan. 13, 2020
Published Online: Apr. 24, 2020
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