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27 February 2019Site symmetry and host sensitization-dependence of Eu3+ real-time luminescence in tin dioxide nanoparticles
Joaquín Fernández,1 Rolindes Balda,2,3 Concepción Cascales,4 Sara García-Revilla2
1Donostia International Physics Ctr. (Spain) 2Univ. del País Vasco (Spain) 3Materials Physics Ctr., CSIC-UPV/EHU (Spain) 4Instituto de Ciencia de Materiales de Madrid (Spain)
A detailed investigation of the dependence of the real time luminescence of Eu3+-doped tin dioxide nanopowders on rare earth site symmetry and host defects is given. Ultrafast spectroscopy shows that host-rare earth energy transfer occurs at a transfer rate of about 1.5×106 s-1, whereas the intrinsic broad band SnO2 emission has a very short build up time, of the order of 60 ps, and a lifetime of hundreds of picoseconds. These results validate the hypothesis that both host and matrix-excited RE emissions are decoupled due to the different origins of the involved physical mechanisms.
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Joaquín Fernández, Rolindes Balda, Concepción Cascales, Sara García-Revilla, "Site symmetry and host sensitization-dependence of Eu3+ real-time luminescence in tin dioxide nanoparticles ," Proc. SPIE 10914, Optical Components and Materials XVI, 109140T (27 February 2019); https://doi.org/10.1117/12.2507261