Enhancement of upconversion luminescence of YAlO3:Er3+ by Gd3+ doping |
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| Authors: | Zhenlong Li Baoshu Wang Licheng Xing Shaolong Liu Na Tan Siguo Xiao and Jianwen Ding |
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| Institution: | 1,2 1 Department of Physics and Institute for Nanophysics and Rare-earth Luminescence, Xiangtan University, Xiangtan 411105, China 2 Key Laboratory of Low Dimensional Materials & Application Technology, Xiangtan University, Xiangtan 411105, China |
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| Abstract: | The upconversion luminescences of YAlO3:Er3+ phosphor co-doping with different Gd3+ concentrations are investigated under the excitation of 980- and 532-nm diode lasers. A near ultraviolet upconversion emission at 410 nm is observed in YAlO3 under 532-nm excitation. Moreover, the inactive Gd3+ ions can improve the upconversion intensity efficiently in a certain range of concentration. Under 980-nm excitation, the visible upconversion emissions at 546 and 646 nm are enhanced by about 10 and 8 times at the Gd3+ concentration of 40%, respectively. The upconversion emission at 410 nm under 532-nm excitation is also enhanced by 7 times. The substitution of Gd3+ ions for Y3+ sites changes the local symmetry of Er3+, leading to the improvement of upconversion efficiency. |
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