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Luminescent and thermal properties of a novel double perovskite La2MgTiO6:Dy3+ phosphors for w-LEDs application.
- Source :
- Journal of Materials Science: Materials in Electronics; Feb2023, Vol. 34 Issue 5, p1-10, 10p
- Publication Year :
- 2023
-
Abstract
- A novel yellow emitting double perovskite La<subscript>2</subscript>MgTiO<subscript>6</subscript>:Dy<superscript>3+</superscript> phosphor was synthesized by a high-temperature solid-phase method. The emission spectra of La<subscript>2</subscript>MgTiO<subscript>6</subscript>:Dy<superscript>3+</superscript> phosphor show three emission bands at 479 nm (blue), 573 nm (yellow), and 668 nm (red) at 351 nm excitation owing to the <superscript>4</superscript>F<subscript>9/2</subscript>-<superscript>6</superscript>H<subscript>15/2</subscript>, <superscript>4</superscript>F<subscript>9/2</subscript>-<superscript>6</superscript>H<subscript>13/2</subscript>, and <superscript>4</superscript>F<subscript>9/2</subscript>-<superscript>6</superscript>H<subscript>11/2</subscript> energy level jumps of Dy<superscript>3+</superscript> ions, respectively. The concentration quenching of the phosphor sample at x = 0.07 mol is caused by dipole–dipole interaction. La<subscript>2</subscript>MgTiO<subscript>6</subscript>: Dy<superscript>3+</superscript> phosphor has superior thermal stability with a luminous intensity of 85.6% at 423 K. The activation energy of the Dy<superscript>3+</superscript> ion is 0.18 eV. The Commission Internationale de I'Eclairage (CIE) coordinates for the phosphors were calculated in the white light region, and the correlated color temperature (CCT) values are in the range of 4376–4586 K for warm white light. The results show that La<subscript>2</subscript>MgTiO<subscript>6</subscript>:Dy<superscript>3+</superscript> phosphors may be a potential for application in w-LEDs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 34
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 161691513
- Full Text :
- https://doi.org/10.1007/s10854-022-09754-w