Publication Date:
2015-08-23
Description:
The rare earth (RE = Eu and Tb) ions-doped α-Zr(HPO 4 ) 2 (ZrP) nanosheet phosphors were synthesized by direct precipitation method, and their structures and photoluminescence properties were investigated. The results of X-ray diffraction and scanning electron microscopy indicated that the systems of ZrP:RE 3+ had similar nanosheet structure except with relatively larger interlayer spacing as compared with pure α-ZrP. Under the excitation of UV light, the ZrP:RE 3+ nanosheet phosphors showed red and green emission peaks corresponding to the 5 D 0 7 F 2 transition of Eu 3+ and the 5 D 4 7 F 5 transition of Tb 3+ , respectively. After Eu 3+ and Tb 3+ were co-doped in ZrP host, not only the red and green emission peaks were simultaneously observed, but also the luminescent intensity and fluorescence lifetimes of Tb 3+ were gradually decreased with the increase in Eu 3+ -doping concentration, which implied the energy transfer from Tb 3+ to Eu 3+ happened. It was deduced that the energy transfer from Tb 3+ to Eu 3+ occurred via exchange interaction. Through optimization to the samples, a nearly white-light emission with the color coordinate (0.322, 0.263) was achieved under 377 nm excitation. The ZrP:RE 3+ nanosheet phosphors may be a potential color-tailorable candidate for fabricating optoelectronic devices such as electroluminescence panels.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Permalink
