Dynamical Processes of Energy Transfer in Red Emitting Phosphor CaMoO₄:Sm³⁺, Eu³⁺

Authors

Ye Jin, Chinese Academy of SciencesFollow
Zhendong Hao, Chinese Academy of SciencesFollow
Xia Zhang, Chinese Academy of ScienceFollow
Yongshi Luo, Chinese Academy of SciencesFollow
Xiao-Jun Wang, Georgia Southern UniversityFollow
Jiahua Zhang, Chinese Academy of SciencesFollow

Document Type

Article

Publication Date

9-2011

Publication Title

Optical Materials

DOI

10.1016/j.optmat.2011.04.009

Abstract

Upon ⁴K_11/2 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 ⁴K_11/2 to ⁴G_5/2 of Sm³⁺ and subsequent transfer to ⁵D₀ of Eu³⁺ rather than ⁵D₁ of Eu³⁺. The fluorescent decay pattern of Sm³⁺⁴G_5/2 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.

Recommended Citation

Jin, Ye, Zhendong Hao, Xia Zhang, Yongshi Luo, Xiao-Jun Wang, Jiahua Zhang. 2011. "Dynamical Processes of Energy Transfer in Red Emitting Phosphor CaMoO₄:Sm³⁺, Eu^{3+." Optical Materials, 33 (11): 1591-1594: Elsevier. doi: 10.1016/j.optmat.2011.04.009
https://digitalcommons.georgiasouthern.edu/physics-facpubs/59}

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