Visible emission of rare-earth-doped ZrO2 nanocrystalline phosphor under UV and IR excitation

Elder De la Rosa-Cruz; Luis A. Diaz-Torres; Pedro Salas; Ruben A. Rodriguez

doi:10.1117/12.506658

26 January 2004 Visible emission of rare-earth-doped ZrO₂ nanocrystalline phosphor under UV and IR excitation

Elder De la Rosa-Cruz, Luis A. Diaz-Torres, Pedro Salas, Ruben A. Rodriguez

Proceedings Volume 5187, Third International Conference on Solid State Lighting; (2004) https://doi.org/10.1117/12.506658
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The photoluminescence and crystalline structure characterization of undoped and several samarium and erbium doped ZrO₂ samples are reported. Strong visible fluorescence emission produced by the transitions ⁴G_5/2→⁶H_5/2,7/2,9/2 of Sm³⁺ was obtained by the excitation of the host at 320 nm (downconversion). Green (545 nm) and red (680 nm) emissions bands were observed under 962 nm excitation (upconversion). Experimental results showed that the emission bands could be tuned by controlling the Er³⁺ concentration. In particular, for the highest Er³⁺ concentration, the red band is enhanced under 962 nm excitation. The nature of this behavior is discussed taking into account the concentration dependent non-radiative energy transfer (⁴I_13/2 + ⁴I_11/2) → (⁴F_9/2 + ⁴I_15/2) and cross-relaxation (²H_11/2 + ⁴I_15/2) → (⁴I_9/2 + ⁴I_13/2) process.

Citation Download Citation

Elder De la Rosa-Cruz, Luis A. Diaz-Torres, Pedro Salas, and Ruben A. Rodriguez "Visible emission of rare-earth-doped ZrO₂ nanocrystalline phosphor under UV and IR excitation", Proc. SPIE 5187, Third International Conference on Solid State Lighting, (26 January 2004); https://doi.org/10.1117/12.506658

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