Preparation and luminescence properties of Li2.06Nb0.18Ti0.76O3:Eu3+ phosphors
Abstract
New red phosphors with compositions of Li2.06Nb0.18Ti0.76O3: xEu3+ (x=1-4wt.%) were prepared by using solid-state reactions. The phase structure and photoluminescence (PL) properties were studied as functions of synthetic temperature and Eu3+ concentration. With the increase of synthetic temperature and Eu3+ concentration, both the characteristic peaks of the excitation spectra monitored at 612nm and emission spectra excited at 396nm were remarkably enhanced. The intensity of peaks reaches a maximum when the content of Eu3+ increases to x=3wt.% at 950∘C, Chromaticity Coordinate (CIE) of samples superior to the commercial red phosphors Y2O3:Eu3+. The internal quantum efficiency (QE) of Li2.06Nb0.18Ti0.76O3:3wt.%Eu3+ was 49.5%. These features show promising applications for near-ultraviolet (near-UV) chips-based LEDs.
- Publication:
-
Functional Materials Letters
- Pub Date:
- 2019
- DOI:
- 10.1142/S179360471950005X
- Bibcode:
- 2019FML....1250005L
- Keywords:
-
- Red phosphors;
- Li<SUB>2</SUB>TiO<SUB>3</SUB> solid solution;
- synthetic temperature;
- Eu3+