Luminescent properties of Li(Ga1-xCrx)5O8 (LGCO) phosphors
Source abstract
Abstract
Abstract In this work, we investigate the synthesis of LiGa5O8 ceramic powders through a polyvinyl alcohol-based sol-gel technique and their optical properties when doped with high Cr3+ concentrations (5, 25 and 50 mol% with respect to the Ga3+ sites). The results indicate that the main crystalline phase, LiGa5O8, is obtained after calcining the samples at 1000 °C/2 h in a static air atmosphere. Via X-ray photoelectron spectroscopy, Cr is confirmed to exist in its trivalent oxidation state and the evaluation of the optical properties is performed via photoluminescence excited from visible to vacuum ultraviolet energy range and with X-ray excited optical luminescence, indicating the typical Cr3+ emission at the near-infrared energy range. The crystal field and Racah parameters are calculated and the influence of Cr3+ concentration in the host material indicates luminescence suppression/quenching and a redshift for a higher amount of these ions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Microwave Dielectric Ceramics Synthesis · Ga2O3 and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (60)
Show source-provided references
1. Optical properties of Fe3+ in ordered and disordered LiAl5O810.1103/PhysRevB.5.3377 ↗
2. Zero-phonon transition and fine structure in the phosphorescence of Fe3+ ions in ordered and disordered LiAl5O810.1063/1.1677027 ↗
3. Luminescence and photoacoustic measurements of LiAl5O8: Fe3+10.1016/0022-2313(88)90150-0 ↗
4. Luminescence study of LiGa5−xFexO810.1016/0022-2313(83)90024-8 ↗
5. Optical and magnetic-circular-dichroism–optically-detected-magnetic-resonance study of the Co2+ ion in LiGa5O810.1103/PhysRevB.45.563 ↗
6. Radiative and nonradiative processes in LiGa5O8: Mn4+10.1016/0921-4526(93)90192-9 ↗
7. EPR and luminescence properties of LiGa5O8:Mn green emitting phosphor10.1016/j.jlumin.2009.02.009 ↗
8. On the 6A1←4T1 luminescence of Fe3+ in disordered nanocrystalline LiGa5O8 prepared by a combustion reaction10.1016/j.cplett.2008.07.016 ↗
9. Persistent spectral hole-burning in diffuse reflection: application to nanocrystalline LiGa5O8:Co2+10.1021/jz100806d ↗
10. Photostimulated near-infrared persistent luminescence as a new optical read-out from Cr3+-doped LiGa5O810.1038/srep01554 ↗
11. Imaging and therapeutic applications of persistent luminescence nanomaterials10.1016/j.addr.2018.10.015 ↗
12. Inorganic nanoparticles for optical bioimaging10.1364/AOP.8.000001 ↗
13. Design and control of the luminescence of Cr3+-doped phosphors in the near-infrared I region by fitting the crystal field10.1021/acs.cgd.8b00273 ↗
14. LiGa 5 O 8 :Cr-based theranostic nanoparticles for imaging-guided X-ray induced photodynamic therapy of deep-seated tumors10.1039/C7MH00442G ↗
15. Functional near infrared-emitting Cr3+/Pr3+ Co-doped zinc gallogermanate persistent luminescent nanoparticles with superlong afterglow for in vivo targeted bioimaging10.1021/ja404243v ↗
16. Sunlight-activated long-persistent luminescence in the near-infrared from Cr3+-doped zinc gallogermanates10.1038/nmat3173 ↗
17. Near-infrared organic light-emitting diodes with very high external quantum efficiency and radiance10.1038/nphoton.2016.230 ↗
18. Cr3+-doped Mg4Ga4Ge3O16 near-infrared phosphor membrane for optical information storage and recording10.1016/j.jallcom.2018.11.065 ↗
19. Tailoring UV-blue sensitization effect in enhancing near infrared emission in X, Yb3+:CaGa2O4 (X = 0, Eu3+ , Bi3+ , Cr3+) phosphor for solar energy conversion10.1016/j.materresbull.2018.04.051 ↗
20. Cr3+ sensitized near infrared emission in Al2O3:Cr,Nd/Yb phosphors10.1016/j.jallcom.2019.03.201 ↗
21. Photostimulated near-infrared persistent luminescence as a new optical read-out from Cr3+-doped LiGa5O8
22. A new generation of highly sensitive luminescent thermometers operating in the optical window of biological tissues10.1039/C6TC01484D ↗
23. Enhanced broadband near-infrared luminescence in transparent silicate glass ceramics containing Yb[sup 3+] ions and Ni[sup 2+]-doped LiGa[sub 5]O[sub 8] nanocrystals
24. Phase transitions in LiAl5O810.1111/j.1151-2916.1963.tb11757.x ↗
25. Transition ordre-desordre et non stoechiometrie de Li0,5Ga2,5O410.1016/0025-5408(74)90104-4 ↗
26. A superstructure in spinels10.1038/1701123a0 ↗
27. Etude structurale de la forme ordonnée de LiAl5O810.1016/0022-4596(79)90107-5 ↗
28. Cationic distribution and its influence on the luminescent properties of Fe3+-doped LiAl5O8 prepared by wet chemical methods10.1016/S0925-8388(98)00159-5 ↗
29. Cao · 2011
30. Effect of the PVA (polyvinyl alcohol) concentration on the optical properties of Eu-doped YAG phosphors10.1016/j.optmat.2016.09.011 ↗
31. Effect of lithium excess on the LiAl5O8:Eu luminescent properties under VUV excitation10.1364/OME.6.002871 ↗
32. Fityk : a general-purpose peak fitting program10.1107/S0021889810030499 ↗
33. A synchrotron beamline for delivering high purity vacuum ultraviolet photons10.1063/1.2813341 ↗
34. A 2.3 to 25 keV XAS beamline at LNLS10.1107/S0909049501005143 ↗
35. Investigations of the optical and EPR properties of LiGa5O8:Cr3+ phosphor10.1016/j.materresbull.2014.09.092 ↗
36. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides10.1107/S0567739476001551 ↗
37. Vegard's law10.1103/PhysRevA.43.3161 ↗
38. Probing the local structure of the near-infrared emitting persistent phosphor LiGa5O8:Cr3+10.1039/C7TC02699D ↗
39. Structure of LiGa5O810.3891/acta.chem.scand.50-0391 ↗
40. The Scherrer equation versus the “Debye-Scherrer equation10.1038/nnano.2011.145 ↗
41. Photoreduction of hexavalent chromium during X-ray photoelectron spectroscopy analysis of electrochemical and thermal films10.1149/1.2085340 ↗
42. X-ray photoelectron spectroscopic chemical state quantification of mixed nickel metal, oxide and hydroxide systems10.1002/sia.3026 ↗
43. Resolving surface chemical states in XPS analysis of first row transition metals, oxides and hydroxides: Cr, Mn, Fe, Co and Ni10.1016/j.apsusc.2010.10.051 ↗
44. Stimulated optical emission in fluorescent solids. II. Spectroscopy and stimulated emission in ruby10.1103/PhysRev.123.1151 ↗
45. Spectroscopic investigation of CaAl12O19:M3+ upon UV/vacuum–UV excitation: a comparison with SrAl12O19:M3+ (M = Pr,Cr)10.1088/0953-8984/19/7/076204 ↗
46. A theory of sensitized luminescence in solids10.1063/1.1699044 ↗
47. Ratiometric optical thermometer with high sensitivity based on dual far-red emission of Cr3+ in Sr2MgAl22O3610.1016/j.ceramint.2019.10.241 ↗
48. Effect of fuel on auto ignition route, photoluminescence and photometric studies of tunable red emitting Mg2SiO4:Cr3+ nanophosphors for solid state lighting applications10.1016/j.jallcom.2016.05.037 ↗
49. Fabrication and luminescent properties of Al2O3:Cr3+ microspheres via a microwave solvothermal route followed by heat treatment10.1016/j.optcom.2012.02.084 ↗
50. Self-flux synthesis and photoluminescent properties of LiAl5O810.1016/j.materresbull.2008.04.003 ↗
51. Long persistent near infrared luminescence nanoprobes LiGa5O8:Cr3+-PEG-OCH3 for in vivo imaging10.1016/j.optmat.2014.04.018 ↗
52. On the absorption spectra of complex ions. I10.1143/JPSJ.9.753 ↗
53. Disorder and the optical spectroscopy of Cr 3+ -doped glasses: I. Silicate glasses10.1088/0953-8984/3/12/022 ↗
54. Disorder and the optical spectroscopy of Cr 3+ -doped glasses. II. Glasses with high and low ligand fields10.1088/0953-8984/3/21/015 ↗
55. Spectroscopic and laser properties of Ce3+-Cr3+-Nd3+ co-doped fluoride phosphate and phosphate glasses10.1016/0022-3093(94)90036-1 ↗
56. Optical absorption and electron paramagnetic resonance study of -doped phosphate glasses10.1088/0953-8984/9/31/021 ↗
57. Orthorhombic site symmetry of Cr3+ in ZnNH4PO4 6H2O crystals10.1002/(SICI)1521-4079(199908)34:7<911::AID-CRAT911>3.0.CO;2-B ↗
58. Lever · 1968
59. Dielectric polarizabilities of ions in oxides and fluorides10.1063/1.353856 ↗
60. Crystal field analysis of Cr 3+ energy levels in LiGa 5 O 8 spinel10.12693/APhysPolA.112.1055 ↗