Formation of rare-earth upconverting nanoparticles using laser vaporization controlled condensation

Garry Glaspell; James R. Wilkins; John Anderson; M. Samy El-Shall

doi:10.1117/12.778030

1 May 2008 Formation of rare-earth upconverting nanoparticles using laser vaporization controlled condensation

Garry Glaspell, James R. Wilkins, John Anderson, M. Samy El-Shall

Proceedings Volume 6940, Infrared Technology and Applications XXXIV; 69403B (2008) https://doi.org/10.1117/12.778030
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

Rare earth doped upconverting nanoparticles have been synthesized via laser vaporization controlled condensation (LVCC) and their photoluminescence properties were characterized using 980 nm laser diode excitation. This procedure is highly tunable, specifically by increasing the Yb³⁺ to Er³⁺ concentration the observed green emission decreases and the observed red emission increases. We have also shown that nearly equal peaks of blue, green and red emissions producing a virtually white upconverter could be synthesized by appropriately mixing Tm³⁺, Ho³⁺, and Er³⁺. We have also investigated the upconversion efficiency in a variety of lattices including Y₂O₃, Gd₂O₃ and La₂O₃. TEM confirmed that the as-formed particles were ~ 10 nm in size and XRD indicated that the overall crystal structure was predominately cubic.

Citation Download Citation

Garry Glaspell, James R. Wilkins, John Anderson, and M. Samy El-Shall "Formation of rare-earth upconverting nanoparticles using laser vaporization controlled condensation", Proc. SPIE 6940, Infrared Technology and Applications XXXIV, 69403B (1 May 2008); https://doi.org/10.1117/12.778030

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KEYWORDS

Nanoparticles

Upconversion

Particles

Erbium

Ions

Luminescence

Semiconductor lasers

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