RT info:eu-repo/semantics/article T1 Efficient dual-wavelength excitation of Tb3+ emission in rare-earth doped KYF4 cubic nanocrystals dispersed in silica sol-gel matrix A1 del-Castillo, Javier A1 Yanes Hernández, Ángel Carlos A1 Santana-Alonso, A. A1 Méndez-Ramos, J. K1 Nano-glass-ceramics K1 Rare-earth ions K1 Iones de tierras raras K1 Sol-gel technique K1 Up-conversion AB Energy transfer from Ce3+ to Tb3+ ions under UV excitation, giving rise to visible emissions, is investigated in sol–gel derived transparent nano-glass–ceramics containing cubic KYF4 nanocrystals, for different doping concentrations of rare-earth ions. Moreover, visible emissions of Tb3+ are also obtained under near-infrared excitation through energy transfer from Yb3+ ions by means of cooperative up-conversion processes. Thus, Ce3+–Tb3+–Yb3+ doped nano-glass–ceramics can be activated in a dual-wavelength mode yielding efficient blue–green emissions of particular interest in photovoltaic silicon solar cells and white-light emitting diodes. PB Elsevier SN 0925-3467 YR 2014 FD 2014 LK http://riull.ull.es/xmlui/handle/915/5017 UL http://riull.ull.es/xmlui/handle/915/5017 LA en DS Repositorio institucional de la Universidad de La Laguna RD 02-dic-2024