Enhancement of Blue Emission via Upconversion in Solid-State Synthesized Hexagonal NaYF4:Ln3+

Abstract:

Article Preview

Hexagonal NaYF4:Ln3+ (Ln3+=Yb3+ and Tm3+) was prepared via solid-state synthesis route. The synthesized powders were identified with X-ray diffraction patterns. Hexagonal phase was obtained by heating the powders at 550°C in reducing atmosphere, and the ions of Yb3+ and Tm3+ were completely incorporated into the lattice of hexagonal NaYF4 in the doping concentration range. Microstructure of the phosphor was observed by scanning electron microscopy (SEM). Intense blue (1G4→3H6, 1D2→3F4) and weak red (1G4→3F4) upconversion emission of Tm3+ ions with the energy transferred from Yb3+ ions were observed in the phosphor excited with a 980nm continuous wave laser diode. The intensity of blue emission was effectively enhanced by suitable doping of Tm3+ and Yb3+ ions, and strongest blue emission was obtained with the concentration of 0.2mol% Tm3+ and 40mol% Yb3+ doped.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

398-401

DOI:

10.4028/www.scientific.net/KEM.368-372.398

Citation:

Y. N. Wu et al., "Enhancement of Blue Emission via Upconversion in Solid-State Synthesized Hexagonal NaYF4:Ln3+", Key Engineering Materials, Vols. 368-372, pp. 398-401, 2008

Online since:

February 2008

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.