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Dynamical Processes of Energy Transfer in Red Emitting Phosphor CaMoO4:Sm3+, Eu3+
Optical Materials
  • Ye Jin, Chinese Academy of Sciences
  • Zhendong Hao, Chinese Academy of Sciences
  • Xia Zhang, Chinese Academy of Science
  • Yongshi Luo, Chinese Academy of Sciences
  • Xiao-Jun Wang, Georgia Southern University
  • Jiahua Zhang, Chinese Academy of Sciences
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Upon 4K11/2 excitation of Sm3+ at 405 nm, the performance of energy transfer from Sm3+ to Eu3+ in the red emitting phosphor CaMoO4:Eu3+, Sm3+ significantly extends its excitation region for better matching the near-UV LED. Photoluminescence spectra indicate that the energy transfer pathway concerns the relaxation from 4K11/2 to 4G5/2 of Sm3+ and subsequent transfer to 5D0 of Eu3+ rather than 5D1 of Eu3+. The fluorescent decay pattern of Sm3+4G5/2 level in CaMoO4:0.5% Sm3+, 2% Eu3+ is studied at 77 K based on the Inokuti–Hirayama formula, revealing an electronic dipole–dipole interaction between Sm3+ and Eu3+. The coefficient for the energy transfer is obtained to be 8.5 × 10−40 s−1 cm6. The fluorescence rise and decay pattern of Eu3+5D0 level as Sm3+ is only excited at 77 K is well described by the dynamical processes of the energy transfer.
Citation Information
Ye Jin, Zhendong Hao, Xia Zhang, Yongshi Luo, et al.. "Dynamical Processes of Energy Transfer in Red Emitting Phosphor CaMoO4:Sm3+, Eu3+" Optical Materials Vol. 33 Iss. 11 (2011) p. 1591 - 1594
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