دورية
CRYSTAL STRUCTURE AND LUMINESCENT PROPERTIES OF Sr2B2O5:Eu2+BLUE PHOSPHORS
| العنوان: | CRYSTAL STRUCTURE AND LUMINESCENT PROPERTIES OF Sr2B2O5:Eu2+BLUE PHOSPHORS |
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| المؤلفون: | LIU, QUAN-SHENG, ZHENG, ZHAO-YANG, CHENG, LI-QUN, ZHANG, XI-YAN, SONG, YUE, LIU, JING-WEN, CUI, TIAN |
| المصدر: | Functional Materials Letters (FML); June 2013, Vol. 6 Issue: 3 |
| مستخلص: | The Sr2B2O5:Eu2+phosphor was synthesized by high-temperature solid state reaction. The crystal structure of Sr2B2O5:Eu2+phosphor is monoclinic system with space group of P21/a(14). Due to Eu2+ion doping, the lattice parameters and unit cell volume decreased. The luminescence spectrum is a broad luminescence band peaking at 468 nm and 478 nm, which corresponds to the transition of 5d-low energy state in Eu2and Eu1to the ground state. The excitation spectrum is at UV region less than 264 nm corresponding to the band gap transition of borate host. The low energy level of 5d-band locates 20921 cm-1, the band width is 1 eV. The electronegativity of O2-anions around Eu1and Eu2is 3.147 eV and 3.326 eV respectively, which determines the split of 5d energy level. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 17936047 17937213 |
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| DOI: | 10.1142/S1793604713500343 |