@article{0c618968c31041ed8666018429bb2156,
title = "Down-conversion process in Tb 3+Yb 3+ co-doped Calibo glasses",
abstract = "The down-conversion process in Tb 3+Yb 3+ co-doped Calibo glasses was studied. The emission, excitation and time-resolved measurements indicated the existence of an energy conversion through the excitation of Tb 3+ ions to near-infrared emission by Yb 3+ ions. The emission intensity dependence on excitation power confirms that the one-photon process is responsible for the Yb 3+ emission. An enhanced Yb 3+ emission was observed with Yb 3+ doping and an optimal energy transfer efficiency of 32\% was obtained before reaching near-infrared emission quenching. The mechanism of the non-resonant energy transfer from Tb 3+ to Yb 3+ is discussed in terms of the Tb 3+Yb 3+ cross-relaxation and multiphonon decay processes.",
keywords = "Calibo, Down-conversion, Energy transfer, Tb Yb ions",
author = "Terra, \{I. A.A.\} and Borrero-Gonz{\'a}lez, \{L. J.\} and Figueredo, \{T. R.\} and Almeida, \{J. M.P.\} and Hernandes, \{A. C.\} and Nunes, \{L. A.O.\} and Malta, \{O. L.\}",
year = "2012",
month = jul,
doi = "10.1016/j.jlumin.2012.02.019",
language = "English",
volume = "132",
pages = "1678--1682",
journal = "Journal of Luminescence",
issn = "0022-2313",
publisher = "Elsevier B.V.",
number = "7",
}