Red-emitting Lu3Al5O12: Mn transparent ceramic phosphors: valence state evolution studies of Mn ions
Source abstract
Abstract
Abstract A red-emitting Lu 3 Al 5 O 12 : Mn (LuAG: Mn) transparent ceramic phosphor was successfully prepared via a two-step process: vacuum sintering and further high-temperature annealing in air. The LuAG: Mn ceramics with a transmittance of ~40% in visible light were obtained after vacuum sintering. Through the transmittance spectra, electron spin resonance measurement, cathodoluminescence technology and photoluminescence spectra, valence state evolution of Mn ions in LuAG ceramics before and after annealing were elaborately demonstrated. It's proved that part of Mn 2+ were oxidized to Mn 4+ during the annealing process, which is responsible for the bright red emission of the annealed sample under ultraviolet light excitation. The red-emitting LuAG: Mn transparent ceramic phosphor is a promising candidate to help make white light-emitting diodes (WLEDs) with high color rendering index.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Research progress and application prospects of transition metal Mn4+-activated luminescent materials10.1039/C6TC02496C ↗
2. CaMg2Al16O27:Mn4+-based red phosphor: a potential color converter for high-powered warm W-LED10.1021/am507316b ↗
3. Photoluminescence properties of Mn4+-activated perovskite-type titanates, La2MTiO6:Mn4+ (M = Mg and Zn)10.1246/cl.150748 ↗
4. MgAl2Si2O8:Mn4+ systems doped with Co-activator for optoelectronic applications10.4028/www.scientific.net/SSP.230.217 ↗
5. Optical properties of Mn4+ ions in GaN:Mn codoped with Mg acceptors10.1063/1.1766082 ↗
6. Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes10.1038/ncomms5312 ↗
7. Thermal-stability comparison of glass- and silicone-based high-power phosphor-converted white-light-emitting diodes under thermal aging10.1109/TDMR.2012.2206813 ↗
8. Development of phosphors with high thermal stability and efficiency for phosphor-converted LEDs10.1186/s40539-014-0011-8 ↗
9. Hybrid 2D photonic crystal-assisted Lu3Al5O12:Ce ceramic-plate phosphor and free-standing red film phosphor for white LEDs with high color-rendering index10.1021/am507237n ↗
10. Transparent YAG:Ce ceramics for WLEDs with high CRI: Ce3+ concentration and sample thickness effects10.1016/j.ceramint.2016.01.079 ↗
11. Mg1.5Lu1.5Al3.5Si1.5O12:Ce3+, Mn2+ A novel garnet phosphor with adjustable emission color for blue light-emitting diodes10.1039/c2ra00894g ↗
12. Synthesis and luminescence properties of a H2 annealed Mn-doped Y3Al5O12:Ce3+ single crystal for WLEDs10.1039/C5CE00641D ↗
13. Green luminescence and EPR studies on Mn-activated yttrium aluminum garnet phosphor
14. Sol–gel preparation of efficient red phosphor Mg2TiO4:Mn4+ and XAFS investigation on the substitution of Mn4+ for Ti4+10.1039/c3tc30553h ↗
15. Abragam · 1990
16. Paramagnetic resonance of divalent manganese incorporated in various lattices10.1039/df9551900118 ↗
17. Mn-activated Na2SiF6 red and yellowish-green phosphors: a comparative study10.1063/1.3639298 ↗
18. Low-energy cathodoluminescence microscopy for the characterization of nanostructures10.1088/1468-6996/11/4/043001 ↗
19. Broad band fluorescence of transition metal doped garnets and tungstates10.1016/0022-2313(84)90207-2 ↗
20. Optical transitions in Mn3+-doped garnets10.1103/PhysRevB.57.2203 ↗
21. Emission of octahedrally coordinated Mn3+ in garnets10.1016/S1386-1425(98)00106-1 ↗
22. Luminescence of Mn2+ ions in Tb3Al5O12 garnet10.1016/j.jlumin.2009.09.024 ↗
23. Tuning excitation and emission of Mn4+ emitting center in Y3Al5O12 by cation substitution10.1016/j.cej.2017.02.119 ↗
24. Enhanced luminescence performances of tunable Lu3–xYxAl5O12:Mn4+ red phosphor by ions of Rn+ (Li+, Na+, Ca2+, Mg2+, Sr2+, Sc3+)10.1021/acs.inorgchem.6b02647 ↗
25. Enhanced luminescence of Mn4+: Y3Al5O12 red phosphor via impurity doping10.1039/C5TC04133C ↗