Open Access Nano Express

Color-tunable properties of Eu3+- and Dy3+-codoped Y2O3 phosphor particles

Timur Sh. Atabaev1, Yoon-Hwae Hwang2 and Hyung-Kook Kim2

Author Affiliations

1 Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Republic of Korea

2 Department of Nanomaterials Engineering and BK21 Nano Fusion Technology Division, Pusan National University, Miryang, 627-706, Republic of Korea

Nanoscale Research Letters 2012, 7:556  doi:10.1186/1556-276X-7-556

Published: 8 October 2012

Abstract

Rare-earth phosphors are commonly used in display panels, security printing, and fluorescent lamps, and have potential applications in lasers and bioimaging. In the present study, Eu3+- and Dy3+-codoped uniform-shaped Y2O3 submicron particles were prepared using the urea homogeneous precipitation method. The structure and morphology of the resulting particles were characterized by X-ray diffraction, field emission scanning electron microscope, and field emission transmission electron microscope, whereas their optical properties were monitored by photoluminescence spectroscopy. The room-temperature luminescence color emission of the synthesized particles can be tuned from red to yellow by switching the excitation wavelength from 254 to 350 nm. The luminescence intensities of red and yellow emissions could be altered by varying the dopant concentration. Strong quenching was observed at high Eu3+ and Dy3+ concentrations in the Y2O3 host lattice.

Keywords:
Y2O3 particles; Luminescence; Urea homogeneous precipitation; Eu3+ and Dy3+ codoped