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초록· 키워드
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Pr<sup>3+</sup>-doped Y₂O₃ powders were synthesized using high-energy ball milling. Their structural and photoluminescence properties were investigated as functions of the concentration of the praseodymium and the annealing temperatures. The X-ray diffraction peaks of the Y₂O₃:Pr<sup>3+</sup> powders matched the standard X-ray diffraction(XRD) peaks of the cubic Y₂O₃ phase without impurities well. The intensity of the XRD peak increased with increasing annealing temperature, as did the photoluminescence emission intensity. These results indicate that the crystallinity of the powder improved with increasng annealing temperature. The highest PL emission intensity was observed at an annealing temperature of 1200 ◦C and Pr<sup>3+ </sup>concentration of 0.1 mol%. The PL spectra showed characteristic peaks at 618 (<sup>3</sub>P<sub>0</sup> → <sup>3</sup>H<sub>6</sub>), 630 (<sup>2</sup>D<sub>1</sub> → <sup>3</sup>H<sub>4</sub>), 644 (<sup>3</sup>P<sub>0 </sub>→ <sup>3</sup>F<sub>2</sub>), and 509 nm (<sup>3</sup>P<sub>0</sub> → <sup>3</sup>H<sub>5</sub>) at an excitation wavelength of 285 nm.
목차
I. INTRODUCTION
II. EXPERIMENTAL METHODS
III. RESULTS AND DISCUSSION
IV. CONCLUSIONS
REFERENCES
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