Upconversion luminescence in Er3+ doped and Er3+/Yb3+ codoped zirconia and hafnia nanocrystals excited at 980 nm
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
01/06/2010
|
| Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Frequency upconversion (UC) luminescence in nanocrystalline zirconia (ZrO2) and hafnia (HfO2) doped with Er3+ and Yb3+ was studied under continuous-wave excitation at 980 nm. Samples of ZrO2:Er3+, ZrO2:Er3+/Yb3+, and HfO2:Er3+/Yb3+ were prepared by the sol-gel technique and characterized using x-ray diffraction and electron microscopy. A study of the infrared-to-green and infrared-to-red UC processes was performed including the analysis of the spectral and the temporal behavior. The mechanisms contributing to the UC luminescence were identified as excited state absorption and energy transfer among rare-earth ions. (C) 2010 American Institute of Physics. [doi:10.1063/1.3428478] |
| Formato |
5 |
| Identificador |
http://dx.doi.org/10.1063/1.3428478 Journal of Applied Physics. Melville: Amer Inst Physics, v. 107, n. 11, p. 5, 2010. 0021-8979 http://hdl.handle.net/11449/26160 10.1063/1.3428478 WOS:000278907100031 WOS000278907100031.pdf |
| Idioma(s) |
eng |
| Publicador |
American Institute of Physics (AIP) |
| Relação |
Journal of Applied Physics |
| Direitos |
closedAccess |
| Palavras-Chave | #dielectric materials #doping #electron microscopy #erbium #hafnium compounds #impurity absorption spectra #infrared spectra #nanofabrication #nanostructured materials #photoexcitation #photoluminescence #sol-gel processing #X-ray diffraction #ytterbium #zirconium compounds |
| Tipo |
info:eu-repo/semantics/article |
