Ultraviolet upconversion luminescence in a highly transparent triply-doped Gd3+-Tm3+-Yb3+ fluoride-phosphate glasses.
GALLEANI, Gustavo; SANTAGNELI, Silvia Helena; LEDEMI, Yannick; MESSADDEQ, Younès; JANKA, Oliver; PÖTTGEN, Rainer; ECKERT, Hellmut.
GALLEANI, Gustavo; SANTAGNELI, Silvia Helena; LEDEMI, Yannick; MESSADDEQ, Younès; JANKA, Oliver; PÖTTGEN, Rainer; ECKERT, Hellmut.
 Abstract: We report near-infrared to ultraviolet (UV) upconversion emissions in triply-doped Gd3+-Tm3+-Yb3+ fluoride- phosphate glasses. Emission at 310 nm, originated from the Gd3+:6P7/2 8S7/2 transition, was observed for the first time in glasses. The high-purity glasses prepared exhibit extended transparency in the UV down to 200-250 nm. The mixed fluoride- phosphate environment of the rare-earth ions was characterized by means of NMR techniques using scandium as a diamagnetic mimic for the luminescent species, for which the ligand distribution was quantified by 45Sc{31P} rotational echo doubleresonance NMR. Both the intensity of the Gd3+ emission as well as those of the UV emissions at 290, 347, and 363 nm increase with increasing ratio of fluoride to phosphate ligands coordinating to the rare-earth ion. | |
| Journal of Physical Chemistry C |
| v. 122, n. 4, p. 2275-2284 - Ano: 2018 |
| Fator de Impacto: 4,536 |
| http://dx.doi.org/10.1021/acs.jpcc.7b09562 |  @article={002871081,author = {GALLEANI, Gustavo; SANTAGNELI, Silvia Helena; LEDEMI, Yannick; MESSADDEQ, Younès; JANKA, Oliver; PÖTTGEN, Rainer; ECKERT, Hellmut.},title={Ultraviolet upconversion luminescence in a highly transparent triply-doped Gd3+-Tm3+-Yb3+ fluoride-phosphate glasses},journal={Journal of Physical Chemistry C},note={v. 122, n. 4, p. 2275-2284},year={2018}} |
