Photoluminescence properties of KBaY(BO3)2:Eu3+/Bi3+ phosphors excited by ultraviolet and blue light
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A series of Eu3+-doped KBaY(BO3)2 phosphors was synthesized through a conventional solid-state reaction method. X-ray power diffraction and photoluminescence spectra were used to characterize the phosphors. The KBaY(BO3)2:Eu3+ phosphor showed an intense orange-red emission at 591 nm and red emission at 610 nm under near-UV (392 nm) and blue-light (463 nm) excitation. These results suggest that KBaY(BO3)2:Eu3+ phosphors are suitable for near-UV or blue-light excitation. Compared with Eu3+ single-doped samples, Eu3+ and Bi3+ co-doped samples possess a peak value of 310 nm, which implies the energy transfer between Bi3+ and Eu3+. Moreover, the energy-transfer mechanism between Eu3+ and Bi3+ in KBaY(BO3)2 was explored, and the mechanism was found to be a dipole–quadrupole interaction. The emission peak intensities of the KBaY(BO3)2:Eu3+ phosphor at 591 and 610 nm are significantly enhanced with the co-activator Bi3+ ion.
KeywordsQuadrupole Interaction Energy Transfer Mechanism Sensitization Agent Emission Peak Intensity Energy Transfer Probability
This work was supported by grants from the Science Foundation of Guangxi Province (No. 2015GXNSFAA139025); the Students Innovation and Entrepreneurship Training Program of Guangxi University (201610593040).
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The authors declare that they have no conflict of interest.
Research involving human and animal participants
This article does not contain any studies with human participants or animals performed by any of the authors.
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