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Blue emission of ZrO2:Tm nanocrystals with different crystal structure under UV excitation |
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| Authors: | Hongwu Zhang Xiaoyan Fu Qin Xin |
| Affiliation: | a Dalian Institute of Chemical Physics, CAS, P.O. Box 110, Dalian 116023, PR China b Chemistry Department, Liaoning Normal University, Dalian 116029, PR China |
| Abstract: | In this paper, thulium doped ZrO2 nanocrystals with different phases were prepared by Pechini sol-gel complex method. The effects of host structure, phases and concentration on luminescence properties of Tm3+ ions were investigated. With the increase of the concentration of Tm3+ ions, the phosphors phase transformed from monoclinic to tetragonal structure and all the phosphors emitted blue light. However, because the environment symmetry around Tm3+ in m-ZrO2 (C2h) is worse than that of t-ZrO2 (D4h), there were still obvious differences in the emission and excitation. The reason was investigated with the help of energy level diagram. In addition, the quenching concentration of Tm3+ in ZrO2 host is 1 m/m%. |
| Keywords: | 78.55.Hx 78.67.Bf 81.20.Ka |
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