Lanthanide(III)-doped nanoparticles that emit in the near infrared

Frank C. J. M. van Veggel; Jan Wiljan Stouwdam; Gerald A. Hebbink; Jurriaan Huskens

doi:10.1117/12.505828

24 November 2003 Lanthanide(III)-doped nanoparticles that emit in the near infrared

Frank C. J. M. van Veggel, Jan Wiljan Stouwdam, Gerald A. Hebbink, Jurriaan Huskens

Proceedings Volume 5224, Nanomaterials and Their Optical Applications; (2003) https://doi.org/10.1117/12.505828
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Monolayer-stabilized nanoparticles of LaF₃ and LaPO₄ doped with the luminescent trivalent lanthanide ions Eu³⁺, Nd³⁺, Er³⁺, Pr³⁺, Ho³⁺, and Yb³⁺ have been prepared. These ions emit in the visible and in the near-infrared part of the electromagnetic spectrum. The ions Nd³⁺, Er³⁺ Pr³⁺, and Ho³⁺ are the main focus in this research because they show emissions in telecommunication windows. The Eu³⁺ ion is an excellent probe for the structural environment of the luminescent ion. It is shown that these lanthanide ions are incorporated in the inorganic host of the particles and that the particles are dispersable in organic solvents. The luminescent lifetimes of the ions are increased orders of magnitude compared to organic complexes, with values ranging from several microseconds for Pr³⁺ and Ho³⁺, up to about 200 μs for Nd³⁺, and 1 ms for Er³⁺. This increase in the luminescence lifetime is indicative of an effective shielding of the lanthanide ions from non-radiative decay of the excited state by the high-energy vibrations of the solvents and the coordinated organic ligands. A model is proposed to describe the non-exponential behavior of the lumienscence decay by quenching from outside the particle.

Citation Download Citation

Frank C. J. M. van Veggel, Jan Wiljan Stouwdam, Gerald A. Hebbink, and Jurriaan Huskens "Lanthanide(III)-doped nanoparticles that emit in the near infrared", Proc. SPIE 5224, Nanomaterials and Their Optical Applications, (24 November 2003); https://doi.org/10.1117/12.505828

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