The effects of dopant concentration and excitation intensity on the upconversion and downconversion emission processes of β-NaYF4:Yb3+,Er3+nanoparticles

1. Torres Vera, V.
2. Mendez-Gonzalez, D.
3. Ramos-Ramos, D.J.
4. Igalla, A.
5. Laurenti, M.
6. Contreras-Caceres, R.
7. Lopez-Cabarcos, E.
8. Díaz, E.
9. Rubio-Retama, J.
10. Melle, S.
11. G. Calderón, O.