26 January 2004 Visible emission of rare-earth-doped ZrO2 nanocrystalline phosphor under UV and IR excitation
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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 4G5/26H5/2,7/2,9/2 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 (4I13/2 + 4I11/2) → (4F9/2 + 4I15/2) and cross-relaxation (2H11/2 + 4I15/2) → (4I9/2 + 4I13/2) process.
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Elder De la Rosa-Cruz, Luis A. Diaz-Torres, Pedro Salas, 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); doi: 10.1117/12.506658; https://doi.org/10.1117/12.506658
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KEYWORDS
Erbium

Samarium

Crystals

Luminescence

Ions

Absorption

Upconversion

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