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Journal of Nanomaterials
Volume 2015, Article ID 969724, 5 pages
http://dx.doi.org/10.1155/2015/969724
Research Article

The Photoluminescence Behaviors of a Novel Reddish Orange Emitting Phosphor CaIn2O4:Sm3+ Codoped with Zn2+ or Al3+ Ions

1School of Materials Science and Engineering, Shaanxi Normal University, Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, Xi’an 710119, China
2School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China

Received 1 December 2014; Revised 26 December 2014; Accepted 29 December 2014

Academic Editor: Yuanlie Yu

Copyright © 2015 Jing Gou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel reddish orange phosphor CaIn2O4:Sm3+ codoped with Zn2+ or Al3+ ions was prepared by solid state reaction and their luminescence properties were investigated under near ultraviolet excitation. The strategy of Zn2+ or Al3+ ions codoping was used with the aim to improve the luminescence properties of CaIn2O4:Sm3+, but the concrete effects of the two ions is different. The introduction of Zn2+ ions can produce defects that favor charge balance in CaIn2O4:Sm3+ to facilitate its photoluminescence. The effect of Al3+ ions codoping can effectively transfer energy from charge-transfer absorption band to characteristic transition of Sm3+ ions, utilizing more energy from host absorption for the photoluminescence of Sm3+ ions. Based on these mechanisms, the luminescence intensity of CaIn2O4:0.6%Sm3+ was enhanced to 1.59 times and 1.51 times when codoping amount of Zn2+ and Al3+ ions reached 0.6%. However, the chromaticity coordinates of CaIn2O4:0.6%Sm3+ almost did not have any changes after Zn2+ ions or Al3+ ions codoping; those are still located at reddish orange region. The excellent luminescence properties of CaIn2O4:0.6%Sm3+,0.6%Zn2+ and CaIn2O4:0.6%Sm3+,0.6%Al3+ demonstrate that they both have potential application value as new-style reddish orange phosphors on light-emitting diode.