Up-conversion luminescence of Er/Yb/Nd-codoped tellurite glasses |
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| Authors: | Longjun Lu Qiuhua Nie Shixun Dai Xianghua Zhang |
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| Affiliation: | a Faculty of Information Science and Engineering, Ningbo University, The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Ningbo, Zhejiang 315211, PR China
b Laboratoire des Verres et ceramiques, Universite de Rennes I, 35042 Rennes Cedex, France |
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| Abstract: | Up-conversion luminescence and energy transfer (ET) processes in Nd3+-Yb3+-Er3+ triply doped TeO2-ZnO-Na2O glasses have been studied under 800 nm excitation. Intense green up-conversion emissions around 549 nm, which can be attributed to the Er3+: 4S3/2→4I15/2 transition, are observed in triply doped samples. In contrast, the green emissions are hardly observed in Er3+ singly doped and Er3+-Yb3+ codoped samples under the same condition. Up-conversion luminescence intensity exhibits dependence of Yb2O3-concentration and Nd2O3-concentration. Up-conversion mechanism in the triply doped glasses under 800 nm pump is discussed by analyzing the ET among Nd3+, Yb3+ and Er3+. And a possible up-conversion mechanism based on sequential ET from Nd3+ to Er3+ through Yb3+ is proposed for green and red up-conversion emission processes. |
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| Keywords: | Rare-earth Up-conversion Energy transfer Triply doped |
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