Publication Date:
2015-04-22
Description:
Rare-earth ion-doped semiconducting phosphor has attracted extensive attention due to the ability to achieve efficient luminescence through the host sensitization. Here, we present a new type red-emitting Eu 3+ -doped BiOCl phosphors possessing a broad excitation band in the near-ultraviolet (NUV) region. Experimental measurements and theoretical calculations confirm that Eu 3+ ion dopants result in forming impurity energy level near valence band, and the excellent broadband NUV-exciting ability of Eu 3+ ion is due to the electronic transitions of BiOCl band gap. Moreover, the highest emission intensity of the phosphors is from the 5 D 0 7 F 4 transition of Eu 3+ around 699 nm (far-red) through whether host excitation or direct Eu 3+ ions excitation, which lie in the particular structure of BiOCl crystals. Our results indicate that the Eu 3+ -doped BiOCl crystals show great potential as red phosphors for white-light-emitting diodes.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
