Author/Authors :
C. Ruvalcaba-Cornejo، نويسنده , , M. Flores-Acosta، نويسنده , , Ma. Elena Zayas، نويسنده , , R. LOZADA-MORALES، نويسنده , , R. PALOMINO-MERINO، نويسنده , , J.E. Espinosa، نويسنده , , O. PORTILLO-MORENO، نويسنده , , J. Mart?nez-Ju?rez، نويسنده , , O. Zelaya-Angel، نويسنده , , S.A. Tomas، نويسنده , , A.B. Soto، نويسنده ,
Abstract :
ZnO–CdO–TeO2 was employed as a host of Tb3+ and Yb3+ ions. The matrix doped with Tb3+ presents a crystalline/amorphous structure, while the same matrix shows an amorphous structure when it is doped with Yb3+. Optical absorption spectra, measured by using photoacoustic (PA) spectroscopy, allowed to determine the band gap, which is localized in the range 3.47–3.60 eV. Both kinds of ions Tb3+ and Yb3+ in the ZnO–CdO–TeO2 matrix show emissions that are characteristic of such ions. For Tb3+ the signals were allocated in 548, 586, 622 nm, respectively, while for Yb3+ only one signal was registered at 1000 nm.
Keywords :
Photoluminescence , terbium , Yterbium and tellurite , photoacoustic
