Energy Transfer and Avalanche Upconversion of NdxY1-xVO4 Nanocrystals
XIAO Si1, ZHOU Li1, WANG Qu-Quan1,2, DENG Hong3, YANG Shi-He3
1Department of Physics, Wuhan University, Wuhan 4300722Center of Nanoscience and Nanotechnology Research, Wuhan University, Wuhan 4300723Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Energy Transfer and Avalanche Upconversion of NdxY1-xVO4 Nanocrystals
XIAO Si1, ZHOU Li1, WANG Qu-Quan1,2, DENG Hong3, YANG Shi-He3
1Department of Physics, Wuhan University, Wuhan 4300722Center of Nanoscience and Nanotechnology Research, Wuhan University, Wuhan 4300723Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
摘要We explore Nd3+ concentration and excitation power dependences of the avalanche upconversion of NdxY1-xVO4 (x=0-1) nanocrystals with uniform size and shape. The avalanche threshold power caused by the near-resonant energy transfer between 4F5/2→4I13/2 and 4F5/2→2G9/2 significantly decreases as the Nd3+ concentration increases. The off-resonant energy transfer between 4F5/2→4I13/2 and 4F5/2→4G11/2 in the strong excitation regime leads to apparent broadening on the blue-side of the upconversion spectrum of NdVO4 nanocrystals.
Abstract：We explore Nd3+ concentration and excitation power dependences of the avalanche upconversion of NdxY1-xVO4 (x=0-1) nanocrystals with uniform size and shape. The avalanche threshold power caused by the near-resonant energy transfer between 4F5/2→4I13/2 and 4F5/2→2G9/2 significantly decreases as the Nd3+ concentration increases. The off-resonant energy transfer between 4F5/2→4I13/2 and 4F5/2→4G11/2 in the strong excitation regime leads to apparent broadening on the blue-side of the upconversion spectrum of NdVO4 nanocrystals.
XIAO Si;ZHOU Li;WANG Qu-Quan;DENG Hong;YANG Shi-He. Energy Transfer and Avalanche Upconversion of NdxY1-xVO4 Nanocrystals[J]. 中国物理快报, 2009, 26(12): 124209-124209.
XIAO Si, ZHOU Li, WANG Qu-Quan, DENG Hong, YANG Shi-He. Energy Transfer and Avalanche Upconversion of NdxY1-xVO4 Nanocrystals. Chin. Phys. Lett., 2009, 26(12): 124209-124209.
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