1. Synthesis and luminescence properties of Dy3+-doped Mg2InSbO6 yellow-emitting phosphors with abnormal thermal quenching performance for w-LEDs.
- Author
-
Deng, Bin, Zhang, Anlin, Chen, Wensheng, Jiang, Jianhong, Liang, Zhikai, Li, Feng, Zeng, Fanhua, and Zhang, Gongguo
- Subjects
LUMINESCENCE ,LIGHT emitting diodes ,SPACE groups ,LUMINESCENCE spectroscopy ,COLOR temperature ,CRYSTAL structure ,PHOSPHORS ,TERBIUM - Abstract
A series of novel yellow-emitting antimonate-based Mg
2 InSbO6 :xDy3+ (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 Mg2 InSbO6 :Dy3+ samples were exhaustively studied. The Mg2 InSbO6 lattice has a trigonal crystal system, which possesses the R 3 ¯ (#148) space group. The as-prepared Mg2 InSbO6 :Dy3+ phosphors show a bright yellow emission peak at 572 nm under near-ultraviolet (n-UV) 349 nm excitation, which is attributed to the4 F9/2 –6 H13/2 transition of Dy3+ . The optimum product is Mg2 InSbO6 :10 mol% Dy3+ with the estimated Rc = 13.05 Å. The optimum sample Mg2 InSbO6 :10 mol% Dy3+ exhibits abnormal thermal quenching phenomenon. The emission intensity reaches a maximum at 420 K. The fluorescence lifetime of Mg2 InSbO6 :10 mol% Dy3+ phosphor is measured to be 0.416 ms. Besides, the CIE chromaticity coordinates of Mg2 InSbO6 :xDy3+ (x = 0.5–25 mol%) phosphors change slightly, which possess low correlated color temperature (CCT) and high color purity. All findings suggest that Mg2 InSbO6 :Dy3+ samples can serve as white emission candidates for white light-emitting diodes (w-LEDs). [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF