Seminar Announcement: Bakang Moses Mothudi

Data pubblicazione: 5-ott-2017 7.12.05

Announcement

Wednesday, 4 October 2017, 15:00

Sala Grande Palazzina B via alla Cascata 56/C

"Structural and optical properies evaluation of NIR up-converting Er³⁺ doped ZnTiO₃-Zn₂TiO₄ nanocomposite phosphor"

Bakang Moses Mothudi

University of South África

bkmmothudi@gmail.com

mothubm@unisa.ac.za

Abstract

NIR up-converting Er³⁺ doped ZnTiO₃-Zn₂TiO₄ nanocomposite phosphor. ZnTiO₃-Zn₂TiO₄ doped with 2 mol% Er³⁺ was synthesized via solid state reaction method. The X-ray diffractometer (XRD) confirmed the crystallization of both the hexagonal ZnTiO₃ and cubic spinel Zn₂TiO₄ phases. The phosphors were excited in the near-infrared (NIR) region with a wavelength of 980 nm diode laser, and the corresponding up-conversion emission lines were observed in the visible range at 543, 553, 650 – 670 nm, which correspond to ²H_11/2, ⁴S_1/2→ ⁴I_15/2 and ⁴F_9/2→ ⁴I_15/2 transitions of Er³⁺ ions, respectively.