Green upconversion luminescence from poly-crystalline Yb3+, Er3+ Co-doped CaMoO4
Green upconversion luminescence from poly-crystalline Yb3+, Er3+ Co-doped CaMoO4
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DOI：
10.1016/j.jallcom.2012.01.059
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发表时间：
2012-05
影响因子：
6.2
通讯作者：
J. Chung;J. Ryu;J. Eun;J. Lee;Sang Yeop Lee;Tae Hyung Heo;B. Choi;K. Shim
中科院分区：
文献类型：
--
作者：
J. Chung;J. Ryu;J. Eun;J. Lee;Sang Yeop Lee;Tae Hyung Heo;B. Choi;K. Shim
采用柠檬酸络合物凝胶法合成了Er 3 +/Yb 3+共掺杂的CaMoO 4多晶，研究了其上转换发光特性。在980 nm激发下，Er 3 +/Yb 3+共掺杂CaMoO 4在670 nm附近有微弱的红光发射，在530和550 nm处有较强的绿色UC发射，对应于Er 3+（4F 9/2，2 H11/2，4S 3/2）→ Er 3+（4 I15/2）的4f内跃迁。确定了Er 3+和Yb 3+的最佳掺杂浓度，得到了最高的UC发光，并详细讨论了Er 3 +/Yb 3+共掺杂CaMoO 4的UC发光机理与泵浦功率的关系。
The upconversion (UC) luminescence properties of polycrystalline Er3+/Yb3+co-doped CaMoO4synthesized by a complex citrate gel method were investigated in detail. Under 980nm excitation, Er3+/Yb3+co-doped CaMoO4has exhibited a weak red emission near 670nm and strong green UC emissions at 530 and 550nm, corresponding to the intra 4f transitions of Er3+(4F9/2,2H11/2,4S3/2)→Er3+(4I15/2). The optimum doping concentrations of Er3+and Yb3+were determined to result in the highest UC luminescence and a possible UC mechanism of Er3+/Yb3+co-doped CaMoO4depending on the pump power dependence is discussed in detail.