TY  - JOUR
AU  - Fernández-González, R.
AU  - Velázquez, J.J.
AU  - Rodríguez, V.D.
AU  - Rivera-López, F.
AU  - Lukowiak, A.
AU  - Chiasera, A.
AU  - Ferrari, M.
AU  - Gonçalves, R.R.
AU  - Marrero-Jerez, J.
AU  - Lahoz, F.
AU  - Núñez, P.
T1  - Luminescence and structural analysis of Ce3+ and Er3+ doped and Ce3+-Er3+ codoped Ca3Sc2Si3O12 garnets: Influence of the doping concentration in the energy transfer processes
LA  - eng
PY  - 2016
SP  - 15054
EP  - 15061
T2  - RSC Advances
SN  - 2046-2069
VL  - 6
IS  - 18
PB  - Royal Society of Chemistry
AB  - We present research on Ca3Sc2Si3O12 garnets doped with Ce3+ and Er3+ ions that were synthesized by the freeze-drying precursor method. The structural characterization was performed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM) images of the calcined material were studied. Nanocrystals of Ca3Sc2Si3O12 were obtained by calcining the precursor at 1200 °C for 4 h with a mean size of about 100 nm. The luminescence features of Ce3+ and Er3+ doped samples indicated that these ions are effectively incorporated into the crystalline phase. In addition, codoping with Ce3+-Er3+ ions results in energy transfer processes from Ce3+ to Er3+ ions which led to the enhancement of near-infrared luminescence at 1.5 μm. The efficiency of this non-radiative energy transfer process has been studied by means of excited state dynamics as a function of the doping concentration. From these results we have found that near-infrared Er3+ luminescence efficiency under VIS Ce3+ excitation is at maximal for 1Ce3+-1Er3+ codoped Ca3Sc2Si3O12 garnets (in mol%). Luminescence quenching at higher Er3+ ion concentrations is observed.
DO  - 10.1039/c5ra22630a
UR  - https://portalciencia.ull.es/documentos/5e39b7182999523aa9270fc2
DP  - Dialnet - Portal de la Investigación
ER  -