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Synthesis and luminescence properties of Dy3+-doped Mg2InSbO6 yellow-emitting phosphors with abnormal thermal quenching performance for w-LEDs.
- Source :
- Journal of Materials Science: Materials in Electronics; Oct2022, Vol. 33 Issue 29, p23030-23041, 12p
- Publication Year :
- 2022
-
Abstract
- A series of novel yellow-emitting antimonate-based Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:xDy<superscript>3+</superscript> (x = 0.5, 1, 2, 10, 15, and 25 mol%) phosphors was firstly synthesized by a solid-state reaction. The crystal structure, X-ray diffraction (XRD), photoluminescence (PL) properties, and the thermal quenching behaviours of prepared Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:Dy<superscript>3+</superscript> samples were exhaustively studied. The Mg<subscript>2</subscript>InSbO<subscript>6</subscript> lattice has a trigonal crystal system, which possesses the R 3 ¯ (#148) space group. The as-prepared Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:Dy<superscript>3+</superscript> phosphors show a bright yellow emission peak at 572 nm under near-ultraviolet (n-UV) 349 nm excitation, which is attributed to the <superscript>4</superscript>F<subscript>9/2</subscript>–<superscript>6</superscript>H<subscript>13/2</subscript> transition of Dy<superscript>3+</superscript>. The optimum product is Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:10 mol% Dy<superscript>3+</superscript> with the estimated R<subscript>c</subscript> = 13.05 Å. The optimum sample Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:10 mol% Dy<superscript>3+</superscript> exhibits abnormal thermal quenching phenomenon. The emission intensity reaches a maximum at 420 K. The fluorescence lifetime of Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:10 mol% Dy<superscript>3+</superscript> phosphor is measured to be 0.416 ms. Besides, the CIE chromaticity coordinates of Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:xDy<superscript>3+</superscript> (x = 0.5–25 mol%) phosphors change slightly, which possess low correlated color temperature (CCT) and high color purity. All findings suggest that Mg<subscript>2</subscript>InSbO<subscript>6</subscript>:Dy<superscript>3+</superscript> samples can serve as white emission candidates for white light-emitting diodes (w-LEDs). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 33
- Issue :
- 29
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 159549552
- Full Text :
- https://doi.org/10.1007/s10854-022-09070-3