Author:
Souza V.S.,Caixeta F. J.,Lima K. O.,Gonçalves R.R.
Abstract
Materials based on (100-X)GeO2–XNb2O5:Ho3+/Yb3+/Tm3+ were prepared by the sol-gel methodology, calcined at 700 to 1100 ºC, followed affected the crystalline structure and the white light generation of the solids.