Relationship between microstructure and the achieving of the single-band red upconversion fluorescence of Er3+/Yb3+ codoped crystallites |
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| Authors: | Yunxin Liu Qibin Yang Guozhong Ren Changfu Xu Yong Zhang |
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| Affiliation: | 1. Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China;2. Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education, Xiangtan University, Xiangtan 411105, China;1. Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, Russian Federation;2. Photochemistry Center, Russian Academy of Sciences, 119421 Moscow, Russian Federation;1. Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Radiochemistry & Isotope Group, Bhabha Atomic Research Centre, Mumbai 400085, India |
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| Abstract: | The as-cast and the heat-treated samples with the primary mole composition of (59.4 ? x)ZnF2–40PbF2–0.1B2O3–xYb2O3–0.5Er2O3 (x = 2, 4, 7, 10, 13) were synthesized. In the as-cast and the heat-treated samples with 13 mol% Yb2O3, the multi-band and the single red band upconversion (UC) lights were observed, respectively, under the excitation of a laser diode (LD) with excitation wavelength of 980 nm. For this interesting phenomenon, microstructure analysis revealed that the crystal phases and the distribution of Er3+ ion has been changed by the heat-treatment and the mole ratio of Yb3+ to Er3+ ion in the neighbor environment of Er3+ ion is increased from 0.74 to 16.96 which brought about the populating behavior variation of 4F7/2 and 4F9/2 levels of Er3+ ions, to which the achieving of the dazzlingly single-narrow-band red light was ascribed. |
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