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Preparation and Luminescence Properties of Blue‐emitting Phosphor Ba 2 Ca ( PO 4 ) 2 : Eu 2+
Author(s) -
Zhang Yuanyuan,
Xia Zhiguo,
Wu Weiwei
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12258
Subject(s) - phosphor , photoluminescence , luminescence , analytical chemistry (journal) , thermal stability , materials science , emission intensity , quenching (fluorescence) , band gap , activation energy , chemistry , mineralogy , fluorescence , optoelectronics , optics , physics , organic chemistry , chromatography
Using the conventional high temperature solid‐state reaction method Ba 2 Ca ( PO 4 ) 2 : Eu 2+ phosphors were prepared. The phase structure, photoluminescence ( PL ) properties, and the PL thermal stability of the samples were investigated, respectively. Under the excitation at 365 nm, the phosphor exhibited an asymmetric broad‐band blue emission with peak at 454 nm, which is ascribed to the 4 f –5 d transition of Eu 2+ . It was further proved that the dipole–dipole interactions results in the concentration quenching of Eu 2+ in Ba 2 Ca 1− x ( PO 4 ) 2 : x Eu 2+ phosphors. When the temperature turned up to 150°C, the emission intensity of Ba 2 Ca 0.99 ( PO 4 ) 2 :0.01 Eu 2+ phosphor was 59.07% of the initial value at room temperature. The activation energy Δ E was calculated to be 0.30 eV , which proved the good thermal stability of the sample. All the properties indicated that the blue‐emitting Ba 2 Ca ( PO 4 ) 2 : Eu 2+ phosphor has potential application in white LED s.