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Synthesis and luminescence properties of a blue‐emitting Sr 3.5 Y 6.5 O 2 (PO 4 ) 1.5 (SiO 4 ) 4.5 :Eu 2+ phosphor
Author(s) -
Xia Zhiguo,
Zhuang Jiaqing
Publication year - 2011
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.1361
Subject(s) - phosphor , luminescence , photoluminescence , analytical chemistry (journal) , materials science , quenching (fluorescence) , fluorescence , crystal structure , atmospheric temperature range , activation energy , excitation , chemistry , crystallography , optics , optoelectronics , physics , quantum mechanics , chromatography , meteorology
A novel blue‐emitting Sr 3.5 Y 6.5 O 2 (PO 4 ) 1.5 (SiO 4 ) 4.5 :Eu 2+ phosphor was synthesized via a solid‐state reaction. Powder X‐ray diffraction (XRD) analysis demonstrated that the Sr 3.5 Y 6.5 O 2 (PO 4 ) 1.5 (SiO 4 ) 4.5 host had a hexagonal crystal structure in the space group P 6 3 /m and unit cell parameters a = 9.418 Å, c = 6.900 Å. The as‐prepared phosphor showed a blue emission and all the main emission peaks were located at around 466 nm for different excitation wavelengths of 297, 333 and 391 nm. The temperature dependence of the photoluminescence property was investigated in the range 20–250 °C, and the emission intensity decreased to 71% of the initial value at room temperature on increasing the temperature to 150 °C. According to the classical theory of fluorescent thermal quenching, the activation energy ( ΔE ) for the thermal quenching luminescence of the as‐prepared Sr 3.45 Y 6.5 O 2 (PO 4 ) 1.5 (SiO 4 ) 4.5 :0.05Eu 2+ phosphor was determined to be 0.20 eV. Copyright © 2011 John Wiley & Sons, Ltd.