Site symmetry and host sensitization-dependence of Eu3+ real-time luminescence in tin dioxide nanoparticles

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.

[1]  C. R. A. Catlow,et al.  A computer modeling study of defect and dopant states in SnO2 , 1990 .

[2]  Joaquín Fernández,et al.  Rare-earth-doped wide-bandgap tin-oxide nanocrystals: pumping mechanisms and spectroscopy , 2018, OPTO.

[3]  W. Yen,et al.  High resolution laser spectroscopy of ions in crystals , 1981 .

[4]  G. Neville Greaves,et al.  Studies of cation dopant sites in metal oxides by EXAFS and computer-simulation techniques , 1992 .

[5]  Wei Zheng,et al.  Persistent luminescence from Eu(3+) in SnO2 nanoparticles. , 2015, Nanoscale.

[6]  Luís D Carlos,et al.  Thermometry at the nanoscale. , 2015, Nanoscale.

[7]  M. Ivanovskaya,et al.  The nature of paramagnetic defects in tin (IV) oxide , 2015 .

[8]  William M. Yen,et al.  Fluorescence line narrowing in inorganic glasses: Linewidth measurements , 1987 .

[9]  Anna N. Morozovska,et al.  Oxygen-vacancy-induced ferromagnetism in undoped SnO 2 thin films , 2012 .

[10]  Raoul Kopelman,et al.  Optical spectroscopy of electronic centers in solids , 1981 .

[11]  Brendan J. Kennedy,et al.  Structural Studies of Rutile-Type Metal Dioxides , 1997 .

[12]  V. Barone,et al.  Direct role of surface oxygen vacancies in visible light emission of tin dioxide nanowires. , 2008, The Journal of chemical physics.

[13]  Plamen Stamenov,et al.  Magnetism in dilute magnetic oxide thin films based on SnO2 , 2006 .

[14]  G. Han,et al.  Multifunctional Rare‐Earth‐Doped Tin Oxide Compact Layers for Improving Performances of Photovoltaic Devices , 2016 .

[15]  Matthias Scheffler,et al.  Sources of electrical conductivity in SnO2. , 2008, Physical review letters.

[16]  Angel Diéguez,et al.  The complete Raman spectrum of nanometric SnO 2 particles , 2001 .

[17]  Giorgio Sberveglieri,et al.  Defect study of SnO2 nanostructures by cathodoluminescence analysis: Application to nanowires , 2007 .