Xu Tie-Feng, Li Guang-Po, Nie Qiu-Hua, Shen Xiang
College of Information Science and Engineering, Ningbo University, Ningbo 315211, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2006 Jun;64(3):560-3. doi: 10.1016/j.saa.2005.07.053. Epub 2006 Feb 2.
Er3+/Yb3+ co-doped TeO2-B2O3-Nb2O5-ZnO (TBN) glasses were prepared. The absorption spectra and upconversion luminescence spectra of TBN glasses were measured and analyzed. The upconversion emission bands centered at 530, 546 and 658 nm were observed under the excitation at 975 nm, corresponding to the transitions of 2H11/2-->4I15/2, 4S3/2-->4I15/2 and 4F9/2-->4I15/2 respectively. The ratio of red emission to green emission increases with an increasing of Yb3+ ions concentration. According to the quadratic dependence on excitation power, the possible upconversion mechanisms and processes were discussed.
制备了Er3+/Yb3+共掺杂的TeO2-B2O3-Nb2O5-ZnO（TBN）玻璃。对TBN玻璃的吸收光谱和上转换发光光谱进行了测量和分析。在975nm激发下，观察到中心位于530、546和658nm的上转换发射带，分别对应于2H11/2→4I15/2、4S3/2→4I15/2和4F9/2→4I15/2的跃迁。随着Yb3+离子浓度的增加，红色发射与绿色发射的比率增大。根据对激发功率的二次依赖性，讨论了可能的上转换机制和过程。
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