ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Hydrothermal synthesis of core-shell structured PS@GdPO₄:Tb³⁺/Ce³⁺ spherical particles and their luminescence properties

Yingying Zhang, Yannan Xue, and Min Yu

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

E-mail: yum406@nenu.edu.cn

Abstract: Non-aggregated spherical polystyrene (PS) particles were coated with GdPO₄:Tb³⁺/Ce³⁺ phosphor layers by a conventional hydrothermal synthesis using poly(vinylpyrrolidone) (PVP) as an additive without further annealing treatment. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), photoluminescence (PL), as well as luminescence decay experiments were used to characterise the resulting core-shell structured PS@GdPO₄:Tb³⁺/Ce³⁺ samples. The results of XRD indicated that the PS particles were successfully coated with the GdPO₄:Tb³⁺/Ce³⁺ phosphor layers, which could be further verified by the images of FESEM. Under ultraviolet excitation, the PS@GdPO₄:Tb³⁺/Ce³⁺ phosphors show Tb³⁺ characteristic emission, i.e. ⁵D₄-⁷F_J (J = {6, 5, 4, 3}) emission lines with green emission ⁵D₄-⁷F₅ (543 nm) as the most prominent group. The core-shell phosphors so obtained have potential applications in field emission display (FED) and plasma display panels (PDP).

Keywords: optical material – chemical synthesis – luminescence – photoluminescence spectroscopy

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-010-0088-5

Chemical Papers 65 (1) 29–35 (2011)