Journal
OPTICAL MATERIALS EXPRESS
Volume 3, Issue 5, Pages 566-573Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.3.000566
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- Defense Advanced Research Projects Agency [ONR-N00014-08-1-0131]
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The tunability, brightness, and energy efficiencies of infrared-emitting rare earth doped nanomaterials are important performance parameters for biomedical imaging applications. In this work, hexagonal phase NaYF4:Yb3+, Ln(3+) (Ho3+, Tm3+ and Pr3+) was synthesized and optimized using a facile hydrothermal method in the presence of poly(vinyl-pyrrolidone). Distinct infrared emission peaks were measured at 1185, 1310 and 1475 nm upon excitation at 980 nm. The optical efficiencies of NaYF4:Yb3+, Ln(3+) at optimal concentrations were measured to quantify the brightness of these particles in comparison to that of NaYF4:Yb3+, Er3+ particles. Efficiencies were ranked as Er3+>Ho3+>Tm3+>Pr3+. (C) 2013 Optical Society of America
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