Colour centres in LiBaF3

Tāle, I.; Kūlis, P.; Rogulis, U.; Tale, V.; Trokss, J.; Veispals, A.; Barboza‐Flores, M.; Fitting, H.‐J.

doi:10.1016/s0022-2313(97)00044-6

Cited by 17 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These defects are generated in the crystal lattice under proton bombardment, and absorption of visible light is caused by electrons (or holes) trapped in the defects. Color centers have been widely studied [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], but their structure and formation are complex.…”

Section: Introductionmentioning

confidence: 99%

Study of color centers induced by PIXE irradiation

Absil

Garnir

Strivay

et al. 2002

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Study of color centers induced by PIXE irradiation

Absil

Garnir

Strivay

et al. 2002

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

“…The luminescence spectrum of annealed sample reveals the formation of an Eu 2+ ion at the cost of an Eu 3+ ion. The change in the oxidation state of Eu 3+ to Eu 2+ ion is well documented in the literature under a high‐temperature treatment in air 10,11,32 . The reduction of the Eu 3+ to the Eu 2+ ion could be explained by a charge compensation model.…”

Section: Resultsmentioning

confidence: 72%

Blue and Red Luminescence from Europium‐Doped Barium TetraBorate Crystals

Dwivedi

Bahadur

2010

Journal of the American Ceramic Society

View full text Add to dashboard Cite

The structural and spectroscopic properties of Barium tetraborate crystals activated with Eu3+ ion have been studied. Differential thermal analysis, X‐ray diffraction (XRD), and SEM techniques have been used for structural characterization. The XRD pattern revealed the formation of α‐BaB4O7 crystals. It was observed that under the proposed charge compensation model, the structural properties of the α‐BaB4O7 crystal significantly alter the luminescence characteristics of Eu3+ and Eu2+ ions. The enhancement of the emission explained and the photo‐physics involved is correlated with the unique structural properties of the crystallites formed.

show abstract

“…Electronic F-type color centers in pure LiBaF 3 have been studied by electron paramagnetic resonance (EPR) technique [37][38][39], optical spectroscopy [40][41][42], trap spectroscopy [43][44][45]. The luminescence bands at 300-370 nm in LiBaF 3 was attributed to charge transfer transitions between F-type and V k centers [35,36].…”

Section: Defect Luminescencementioning

confidence: 99%

Photoluminescence of monoclinic Li3AlF6 crystals under vacuum ultraviolet and soft X-ray excitations

et al. 2015

View full text Add to dashboard Cite

Using Bridgman technique we have grown monoclinic β-LiAF crystals suitable for optical studies, performed XRD-identification and Rietveld refinement of the crystal structure and carried out a photoluminescence study upon vacuum ultraviolet (VUV) and extreme ultraviolet (XUV)-excitations, using the low-temperature (T = 7.2 K) time-resolved VUV-spectroscopy technique. The intrinsic PL emission band at 340-350 nm has been identified as due to radiative recombination of self-trapped excitons. The electronic structure parameters were determined: bandgap E g ≈ 12.5 eV, energy threshold for creation of unrelaxed excitons 11.8 eV < E n < 12.5 eV. The PL emission bands at 320-325 and 450 nm were attributed to luminescence caused by lattice defects. We have discovered an efficient excitation of PL emission bands in the energy range of interband transitions (E ex > 13.5 eV), as well as in the energy range of core transitions at 130 eV. We have revealed UV-VUV PL emission bands at 170 and 208 nm due to defects. A reasonable assumptions about the origin of the UV-VUV bands were discussed.

show abstract

Colour centres in LiBaF3

Cited by 17 publications

References 0 publications

Study of color centers induced by PIXE irradiation

Study of color centers induced by PIXE irradiation

Blue and Red Luminescence from Europium‐Doped Barium TetraBorate Crystals

Photoluminescence of monoclinic Li3AlF6 crystals under vacuum ultraviolet and soft X-ray excitations

Contact Info

Product

Resources

About