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《Chinese Journal of Luminescence》 2015-01
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Influence of Gd~(3+) Doping on The Upconversion Luminescence Properties of NaYF_4∶Yb~(3+),Tm~(3+)/Er~(3+) Nanoparticles

HU Rong-xuan;WANG Hui-yun;ZHENG Tong;YE Song;LIN Jian;WANG De-ping;School of Materials Science and Engineering,Tongji University;  
A series of Yb3+ -Tm3+ and Yb3+ -Er3+ codoped NaYGdF4 upconversion luminescent nanoparticles were prepared via a facile modified solvothermal method. The phase(cubic or hexagonal),size and upconversion luminescence properties of the final products can be well controlled by adjusting Gd3+ content. The introduction of Gd3+ can effectively promote the hexagonal to cubic phase transformation and size reduction of NaYGdF4 nanocrystals. The upconversion emission intensity of NaYGdF4∶ Yb3+ ,Er3+ / Tm3+ can be improved by optimizing Gd3+ content. Meanwhile,the upconversion mechanism was discussed by studying the excitation power dependent visible emission intensity of Tm3+ and Er3+ in different wavelength regions.
【Fund】: 上海市教育委员会科研创新项目(14ZZ037);; 上海市科委基础研究重点项目(12JC1408500)资助
【CateGory Index】: O482.31
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