Emission of 1.53 microm originating from the lattice site of Er3+ ions incorporated in TiO2 nanocrystals |
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Authors: | Fu Chengyu Liao Jinsheng Luo Wenqin Li Renfu Chen Xueyuan |
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Institution: | Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. |
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Abstract: | Er(3+)-ion-doped anatase TiO(2) nanocrystals were prepared by simple wet chemical synthesis. Very sharp and intense near-infrared luminescence at approximately 1.53 microm was observed that originated from the lattice site of Er(3+) ions incorporated in TiO(2) nanocrystals. Based on the high-resolution emission and excitation spectra at 10 K, an efficient energy transfer from the TiO(2) host to Er(3+) ions was verified. The luminescence decay for the I13/24-->I15/24 transition at 1.53 microm showed nonexponential characteristics, indicating a nonradiative relaxation to the defects in the nanocrystals, and the intrinsic lifetime of the I13/24 state was determined to be 1.56 ms. |
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