標題: Luminescence and Energy Transfer Mechanism in Ca10K(PO4)(7):Eu2+, Mn2+ Phosphor
作者: Liu, Wei-Ren
Chiu, Yi-Chen
Yeh, Yao-Tsung
Jang, Shyue-Ming
Chen, Teng-Ming
應用化學系
Department of Applied Chemistry
公開日期: 1-Jan-2009
摘要: A series of Ca10K(PO4)(7):Eu2+, Mn2+ (CKP: Eu2+, Mn2+) phosphors was synthesized by solid-state reaction. Under an optimal excitation of 347 nm, we have observed a blue emission band at 467 nm and a red emission band at 634 nm, which resulted from Eu2+ and Mn2+, respectively. The energy transfer from Eu2+ to Mn2+ in CKP host matrix is of a resonant type via a dipole quadrupole mechanism. By properly varying the ratio of Eu/Mn, the emission hue can be tuned from blue (0.18,0.21), to white (0.30,0.24), and finally to red (0.35,0.24). The intensity of composition-optimized CKP:Eu2+ is about 30% of BaMgAl10O17: Eu2+. The measurement of thermal quenching for CKP: Eu2+, Mn2+ and yttrium aluminum garnet:Ce3+ was also compared and investigated in the study. The (CKP: Eu2+,Mn2+) phosphor may serve as a candidate for UV light-emitting diode application. (C) 2009 The Electrochemical Society. [DOI: 10.1149/1.3121531] All rights reserved.
URI: http://dx.doi.org/10.1149/1.3121531
http://hdl.handle.net/11536/149805
ISSN: 0013-4651
DOI: 10.1149/1.3121531
期刊: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume: 156
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