Effects of the Concentration of Eu3+ Ions and Synthesizing Temperature on the Luminescence Properties of Sr2−xEuxZnMoO6 Phosphors
| Autor: | Su-Hua Yang, Chi-Yu Lin, Jih-Lung Lin, Cheng-Fu Yang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Diffraction
Materials science synthesizing temperature Analytical chemistry Mineralogy Phosphor 02 engineering and technology double perovskite oxides 010402 general chemistry 01 natural sciences lcsh:Technology Ion lcsh:Chemistry Concentration quenching General Materials Science Ceramic Instrumentation lcsh:QH301-705.5 Fluid Flow and Transfer Processes lifetime Sr2−xEuxZnMoO6 phosphors lcsh:T Process Chemistry and Technology General Engineering 021001 nanoscience & nanotechnology lcsh:QC1-999 0104 chemical sciences Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 visual_art Linear relation visual_art.visual_art_medium Double perovskite 0210 nano-technology Luminescence lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences; Volume 7; Issue 1; Pages: 30 Applied Sciences, Vol 7, Iss 1, p 30 (2016) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app7010030 |
| Popis: | The effect of Eu2O3 concentration on the luminescence properties of double perovskite (cubic) Sr2−xEuxZnMoO6 phosphors was thoroughly investigated using different synthesizing temperatures. Phosphors with the composition Sr2−xEuxZnMoO6, where Eu2O3 was substituted for SrO and x was changed from 0 to 0.12, were synthesized by the solid-state method at temperatures of 900–1200 °C, respectively. Analysis of the X-ray diffraction (XRD) patterns showed that even when the synthesizing temperature was 1100 °C, secondary or unknown phases were observed in Sr2−xEuxZnMoO6 ceramic powders. The effect of the concentration of Eu3+ ions on the luminescence properties of the Sr2−xEuxZnMoO6 phosphors was readily observable because no characteristic emission peak was observed in the Sr2ZnMoO6 phosphor. Two characteristic emission peaks at 597 and 616 nm were observed, which correspond to the 5D0–7F1 and 5D0–7F2 transitions of Eu3+ ions, respectively. The two characteristic emission peaks of the Sr2−xEuxZnMoO6 phosphors were apparently influenced by the synthesizing temperature and the concentration of Eu3+ ions. When x was larger than 0.08, a concentration quenching effect of Eu3+ ions in the Sr2−xEuxZnMoO6 phosphors could be observed. The lifetime of the Sr2−xEuxZnMoO6 phosphors decreased as the synthesizing temperature increased. A linear relation between temperature and lifetime was obtained by using a fitting curve of t = −0.0016 × T + 3.543, where t was lifetime and T was synthesizing temperature. |
| Databáze: | OpenAIRE |
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