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Media type:
E-Article
Title:
Spark plasma sintering of MgAl2O4:Mn2+ transparent ceramic phosphors with low thermal quenching, narrow-band green emission
Contributor:
Lin, Hui;
Duan, Yutong;
Pan, Yuxin;
Rong Gui, Sa Chu;
Li, Yukun;
Hong, Ruijin;
Zhang, Dawei
imprint:
Optica Publishing Group, 2023
Published in:Optics Express
Language:
English
DOI:
10.1364/oe.474562
ISSN:
1094-4087
Origination:
Footnote:
Description:
<jats:p>MgAl<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>:Mn<jats:sup>2+</jats:sup> transparent ceramics were fabricated by reactive spark plasma sintering (SPS). The ceramic samples show narrow-band green emission under the 450 nm blue light excitation, which is corresponding to <jats:sup>4</jats:sup>T<jats:sub>1</jats:sub>(<jats:sup>4 </jats:sup>G)-<jats:sup>6</jats:sup>A<jats:sub>1</jats:sub>(<jats:sup>6</jats:sup>S) transition of Mn<jats:sup>2+</jats:sup> in the tetrahedral site. The emission peak of the Mg<jats:sub>0.93</jats:sub>Al<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>:0.07Mn<jats:sup>2+</jats:sup> ceramic sample was located at 525 nm with the full-width at half-maximum (FWHM) value of 36 nm. The internal quantum yield (IQY) of Mg<jats:sub>0.93</jats:sub>Al<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>:0.07Mn<jats:sup>2+</jats:sup> reached 63%. The emission intensity remained ∼98% at 150 °C compared to its initial value at room temperature, showing excellent thermal quenching performance. The results indicated that MgAl<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>:Mn<jats:sup>2+</jats:sup> ceramic phosphor is a promising candidate for high brightness, wide gamut display backlight applications.</jats:p>