Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1612460 | Journal of Alloys and Compounds | 2014 | 6 Pages |
Abstract
Luminescent materials composed of Y1âmânErmYbnOCl (m = 0.001-0.1, n = 0.005-0.1) were prepared via a solid-state reaction using NH4Cl flux. Photoluminescence spectra, the dependence of the luminescent intensity as a function of Er3+ content, and their CIE coordinates of the Er3+-doped layered YOCl compounds were also investigated under near-ultraviolet (NUV) and visible lights. The spectral up-converting properties of Er3+ and Er3+-Yb3+ in YOCl phosphors were elucidated under 980 and 1550 nm diode laser irradiations. This up-conversion emission spectra and the pump power dependence versus emission intensity observed in the Y0.9Er0.1OCl up-conversion phosphors gave rise to one- and two-photon processes. The up-conversion mechanism of Er3+ and Yb3+ ions in YOCl was described by a schematic energy-level diagram. Through the use of these up-conversion luminescent materials, the desired emitting lights throughout the orange and red regions of the spectra were achieved.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Sangmoon Park, So-Hye Cho,