Structural, thermal and light emission properties of Eu, Sm, Dy, Er and Mn doped CaAl2O4 and SrAl2O4
Source abstract
Abstract
Abstract 1 mol% Re2O3/MnO – 99 mol% MAl2O4 (Re = Eu, Sm, Dy, Er and M = Ca and Sr) powder samples were prepared by solid state sintering in the temperature range of 1386–1450 °C and their structural, thermal and photoluminescence properties were compared. X-ray diffraction and Rietveld refinement studies of calcium aluminate samples confirm the formation of monoclinic CaAl2O4 along with a small concentration (1.9–4.6 wt %) of monoclinic CaAl4O7 while the strontium aluminate samples contain monoclinic SrAl2O4 and a small amount (0.7–3.5 wt %) of cubic Sr3Al2O6. The short-range structure of CaAl2O4 consists of CaO6, CaO9 and AlO4 structural units while that of SrAl2O4 contains SrO9 and AlO4 units. The Sr–O bond-lengths (2.32–3.58 A) are longer than Ca–O bond-lengths (2.04–3.18 A) and Al–O bond-lengths are of the range 1.35–2.12 A. Differential scanning calorimetry studies reveal high thermal stability of calcium aluminates, while strontium aluminate samples show reversible monoclinic to - hexagonal structural phase transition at 688 °C during heating cycle. Raman spectra exhibit Al–O vibrational modes. Photoluminescence studies show reddish-orange emission in Eu, Sm and Mn-doped samples, Er doped samples show green emission and Dy-doped samples emit yellow-white light. Calcium aluminate samples show significantly higher luminescence intensity and quantum yield than strontium aluminates.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Microwave Dielectric Ceramics Synthesis · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
Show source-provided references
1. Theoretical study of structural, electronic, lattice dynamical and dielectric properties of SrAl2O410.1016/j.jallcom.2011.01.046 ↗
2. Polarization-resolved Raman modes of monoclinic SrAl2O4 ceramics10.1002/jrs.5405 ↗
3. Dysprosium activated strontium aluminate phosphor: a potential candidate for WLED applications10.1016/j.jlumin.2020.117126 ↗
4. On the polymorphism of CaAl2O4—structural investigations of two high pressure modifications10.1016/j.solidstatesciences.2005.12.010 ↗
5. Long lasting phosphors: SrAl2O4: Eu, Dy as the most studied material10.1016/j.rser.2017.06.081 ↗
6. Transitions between P21, P63(√3A), and P6322 modifications of SrAl2O4 by in situ high-temperature X-ray and neutron diffraction10.1016/j.jssc.2007.10.021 ↗
7. The behavior of thermally and optically stimulated luminescence of SrAl2O4: Eu2+, Dy3+ long persistent phosphor after blue light illumination10.1016/j.radmeas.2007.11.064 ↗
8. Chernov · 2006 · 1326
9. Effects of Li+ codoping on the optical properties of SrAl2O4 long afterglow ceramic phosphors
10. Effect of flux on the properties of CaAl2O4: Eu2+, Nd3+ long afterglow phosphor10.1016/j.jallcom.2007.04.013 ↗
11. A new long phosphorescent phosphor with high brightness, SrAl2O4: Eu2+, Dy3+10.1149/1.1837067 ↗
12. Preparation and luminescent properties of CaAl2O4: Eu3+, R+ (R= Li, Na, K) phosphors10.1016/S1002-0721(09)60042-9 ↗
13. Crystal structure, photoluminescence and cathodoluminescence of Sr1-xCaxAl2O4 doped with Eu2+10.1364/OME.9.002175 ↗
14. Preparation of long-afterglow Sr4Al14O25-based luminescent material and its optical properties10.1016/S0167-577X(01)00257-9 ↗
15. On the infrared emissions of Er3+/Yb3+ co-doped SrAl2O410.1016/j.ijleo.2017.02.066 ↗
16. Laser sintering of persistent luminescent CaAl2O4: Eu2+ Dy3+ ceramics10.1016/j.optmat.2016.10.050 ↗
17. Luminescence and EPR investigations of Mn activated calcium aluminate prepared via combustion method10.1016/j.optmat.2007.01.003 ↗
18. Preparation and characterization of calcium aluminate by chemical synthesis10.1016/S1005-8850(06)60019-4 ↗
19. Amer · 2020
20. Long lasting phosphorescence of Sr4Al14O25: Eu2+, Dy3+ thin films by magnetron sputtering10.1016/j.tsf.2004.01.068 ↗
21. Photoluminescence properties of crystallized strontium aluminate thin films prepared by ion-beam evaporation10.1016/S0040-6090(02)00027-5 ↗
22. Structural and optical characterization of Eu and Dy doped CaWO4 nanoparticles for white light emission10.1016/j.jallcom.2020.154804 ↗
23. Effects of annealing temperature on structural and photoluminescence properties of Eu, Dy and Sm doped CaWO4 nanoparticles10.1016/j.ceramint.2020.07.211 ↗
24. Structural and optical characterization of Er-doped CaMoO4 down-converting phosphors10.1107/S2052520620011397 ↗
25. Rodriguez-Carvajal · 1998
26. Young · 1993
27. Simultaneous Rietveld refinement of three phases in the Ag-In-S semiconducting system from X-ray powder diffraction10.1016/S0025-5408(01)00741-3 ↗
28. Fluorescence characteristics of Dy3+ ions in calcium fluoroborate glasses10.1016/j.jlumin.2010.05.006 ↗
29. Determination of room-temperature fluorescence and phosphorescence quantum yields for compounds adsorbed on solid surfaces10.1021/ac00294a028 ↗
30. Crystal structure, infrared reflectivity spectra and microwave dielectric properties of CaAl2O4 ceramics with low permittivity10.1016/j.jallcom.2019.03.369 ↗
31. Reducing particle size of persistent luminescent SrAl2O4: Eu2+, Dy3+ via microwave-assisted, reverse micelle synthesis10.1364/OME.7.002597 ↗
32. VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data10.1107/S0021889811038970 ↗
33. The structure of aluminate glasses by neutron diffraction10.1016/S0022-3093(00)00208-8 ↗
34. Zur Verbindungsbildung von MeO: M2O3. IV. Zur Struktur von monoklinem SrAl2O410.1002/zaac.19814750423 ↗
35. The influence of boric acid on improved persistent luminescence and thermal oxidation resistance of SrAl2O4: Eu2+10.1016/j.jlumin.2015.06.021 ↗
36. Hydration of strontium-doped monocalcium aluminate10.13005/ojc/340148 ↗
37. Eu2+ activated long persistent strontium aluminate nano scaled phosphor prepared by precipitation method10.1016/j.jallcom.2005.04.219 ↗
38. Liu · 2018 · 163
39. Raman spectroscopy of anhydrous and hydrated calcium aluminates and sulfoaluminates10.1111/jace.12535 ↗
40. Raman and 27Al NMR structure investigations of aluminate glasses:(1−x) Al2O3 − xMO, with M = Ca, Sr, Ba and 0.5< x< 0.7510.1016/j.jnoncrysol.2011.03.001 ↗
41. Investigating Raman spectra and density functional theory calculations on SrAl2O4 polymorphs10.1002/jrs.5497 ↗
42. Molybdenum-doping-induced photoluminescence enhancement in Eu3+-activated CaWO4 red-emitting phosphors for white light-emitting diodes10.1016/j.dyepig.2017.04.037 ↗
43. Mechanism of the reduction and energy transfer between Eu2+ and Eu3+ in Eu-doped CaAl2Si2O8 materials prepared in air10.1039/C3TC32378A ↗
44. Synthesis and photoluminescence properties of BaWO4: RE3+ (RE = Eu or Sm) Phosphors10.3938/jkps.72.959 ↗
45. Color tuning in thermally stable Sm3+-activated CaWO4 nanophosphors10.1039/C4NJ01911C ↗
46. A new single-phase white-light-emitting CaWO4:Dy3+ phosphor: synthesis, luminescence and energy transfer10.1039/C5RA12502B ↗
47. Synthesis and luminescent behavior of UV induced Dy3+ activated LaAlO310.1007/s10854-016-5819-0 ↗
48. Tunable white light and energy transfer of Dy3+ and Eu3+ doped Y2Mo4O15 phosphors10.1016/j.ceramint.2016.05.075 ↗
49. Up/down conversion, tunable photoluminescence and energy transfer properties of NaLa(WO4)2: Er3+, Eu3+ phosphors10.1039/C5RA17370A ↗
50. VUV spectroscopy of BaF2: Er10.1016/j.optmat.2007.09.017 ↗
51. Excitation dependent visible and NIR photoluminescence properties of Er3+, Yb3+ co-doped NaBi(MoO4)2 nanomaterials10.1039/D0RA01272F ↗
52. Solid state synthesis of SrAl2O4: Mn2+ co-doped with Nd3+ phosphor and its optical properties10.1016/j.jlumin.2013.06.040 ↗
53. Naidu · 2011 · 312