Publication Date:
2013-03-16
Description:
This article reports the structural and luminescence characteristics of Eu 2+ -activated solid solutions of ( KSrPO 4 ) 1− x ·(( Ba , Sr ) 2 SiO 4 ) x for 0 ≤ x ≤ 1. These phosphors were prepared by a sol-gel/Pechini method. The lattice parameters of the solid solutions are linearly dependent on x . The reliability factor from Rietveld analysis is nearly constant and independent of x , indicating KSrPO 4 ·( Ba , Sr ) 2 SiO 4 forms an ideal solid solution. The emission spectra consist of two distinct broad bands, which depend on x : blue ranging from 430 to 470 nm and green–yellow ranging from 515 to 570 nm. Both emission peaks red-shift as x increases due to the crystal field effect and an anomalous transition. The emission intensity of these solid solutions is also a function of x and is comparable to that of LiCaPO 4 : Eu 2+ (QE = 81%) at x = 0.1, suggesting that these color-tunable solid solutions are promising for applications in solid-state white lighting.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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