کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1812038 | 1025606 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and crystal structures and luminescent properties of divalent europium-doped Ba2ZnSi2O7 and BaZn2Si2O7 Synthesis and crystal structures and luminescent properties of divalent europium-doped Ba2ZnSi2O7 and BaZn2Si2O7](/preview/png/1812038.png)
The monoclinic Ba2ZnSi2O7:Eu2+ blue-green-emitting phosphor and the orthorhombic BaZn2Si2O7:Eu2+ green-emitting phosphor were prepared by combustion-assisted synthesis method as the fluorescent materials for ultraviolet-light-emitting diodes (UV-LEDs) performed as a light source. The crystallinity and luminescence were investigated using X-ray diffraction (XRD) and photoluminescence (PL) spectroscopy. Pure monoclinic Ba2ZnSi2O7 and orthorhombic BaZn2Si2O7 crystallize completely at 1100 °C. The doped Eu2+ ions did not cause any significant change in the host structure. The emission spectra presented an emission position red shift of up to 16 nm from Ba2ZnSi2O7:Eu2+ to BaZn2Si2O7:Eu2+. The excitation spectra of Ba2ZnSi2O7:Eu2+ and BaZn2Si2O7:Eu2+ were broad-banding, extending from 260 to 465 nm, which match the emission of UV-LEDs.
Journal: Physica B: Condensed Matter - Volume 406, Issue 2, 15 January 2011, Pages 250–253