Facile solution-precipitation assisted synthesis and luminescence property of greenish-yellow emitting Ca6Ba(PO4)4O:Eu2+ phosphor. (March 2016)

• Record Type: Journal Article
• Authors: Ji, Haipeng; Huang, Zhaohui; Xia, Zhiguo; Xie, Yao; Molokeev, Maxim S.; Atuchin, Victor V.
• Is Part Of: Materials research bulletin. Volume 75(2016)
• Page Start: 233
• Page End: 238
• Publication Date: 2016-03
• Subjects: A. Optical materials -- B. Optical properties -- D. Crystal structure -- B. Luminescence -- D. Phosphors; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.11.055
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Ca6 Ba(PO4 )4 O:Eu 2+ phosphor was prepared by the solution-precipitation assisted route. The phosphors have satisfactory smooth grain surface and particle size. It shows greenish-yellow color emission (maximum at 540 nm) upon blue light excitation. Eu 2+ is coordinated with isolated oxygen atoms and those from PO4 polyhedra. Abstract: Greenish-yellow emitting microcrystalline Ca6 Ba(PO4 )4 O:Eu 2+ phosphor was successfully prepared by a solution-precipitation assisted high temperature reaction method. Phase structure, morphology and/or luminescence properties of the precursor and the as-prepared phosphors were characterized. The phase-pure Ca6 Ba(PO4 )4 O:Eu 2+ phosphors were obtained with smooth grain surface and particle size of 2–8 μm. Ca6 Ba(PO4 )4 O:Eu 2+ exhibits bright greenish-yellow color emission with its maximum at 540 nm upon UV-blue light excitation. The maximum position of the broad emission band is independent on the calcination temperature. The emission intensity increases with increasing calcination temperature due to improved crystallinity. Besides, the presence of two Eu 2+ emission centers in the Ca6 Ba(PO4 )4 O crystal lattice was confirmed and the coordination effects are considered concerning the roles of isolated O atoms and those from the PO4 tetrahedra.