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: | 1-一月-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 |
顯示於類別: | 期刊論文 |