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Crystal field distribution in disordered materials doped with chromium.

100%

Grinberg M.

2000

tom Vol. 30, nr 4

657-662

An analysis of the crystal field distribution and distribution of the electron lattice coupling of disordered materials doped with Cr/sup 3+/ ions is presented. The theoretical background contains the extended crystal field model based calculations of the emission line-shape and kinetics. The multi-site effect in the gallogermanate and lithium tantalate crystals and aluminosilicate glasses is analysed in detail.

Photoacoustics and Migration Prcess of Luminescent Centres in Solids

51%

Grinberg M. , Sikorska A. , Śliwiński A.

tom Vol. 23

159-165

The model describing relation between photoacoustic and absorption spectra in the case of spatial migration from the luminescence contre to the surface is presented and some results of its application to expalain experimental data obtain for YAG:Cr3 crystal are discussed.

Photoacoustic Spectra as a Tool for Studying Nonradiative Relaxation Process in Luminescence Centres in Solids (a review)

51%

Śliwiński A. , Grinberg M. , Sikorska A.

2001

tom Vol. 22

261-274

High pressure spectroscopy of Pr3+ doped KLa(MoO4)2 crystal

45%

Galanciak D. , Gryk W. , Grinberg M. , Macalik L. , Mączka M.

2006

tom Vol. 36, nr 4

s. 443--450

Optical properties and electronic structure of Pr3+ ion in KLa0.75Pr0.25(MoO4)2 have been investigated. The standard spectroscopy (excitation and photoluminescence spectra) and the high pressure spectroscopy methods have been used. Hydrostatic pressure up to 100 kbar has been applied in diamond anvil cell. The luminescence related to the transitions from the 3P0 and 1D2 states have been measured at ambient temperature for different pressures. We have found that the pressure shifts of the observed emission lines are negative and equal to 2–3 cm–1/kbar. It is due to the changes in Slater and α, β, γ parameters and diminishing of the spin-orbit coupling constant ζ.

The Influence of Synthesis Temperature on Manufacturing and Properties of SrSi2O2N2:Eu2+ Powders

38%

Pawlik T. , Sopicka-Lizer M. , Michalik D. , Barzowska J. , Szczodrowski K. , Lesniewski T. , Grinberg M.

tom 62

nr 2

Spectroscopy and high pressure spectroscopy of the Cr-doped glass materials.

38%

Grinberg M. , Borzowska J. , Padlyak B. , Nowosielski T. , Kukliński B. , Buchynski P.

2000

tom Vol. 30, nr 4

509-516

Optical spectroscopy and high pressure optical spectroscopy of the Cr-doped glasses of CaO-Ga/sub 2/O/sub 3/-GeO/sub 2/ system have been used. The emission spectrum consists of the broad band at about 12700 cm/sup -1/ and the sharper band with maximum peak at 14495 cm/sup -1/ (the R line emission). We have attributed the R line luminescence to the octahedral strong field Cr/sup 3+/ sites in the microcrystallites whereas the broad band luminescence has been related to the chromium in the glassy phase.

The Influence of Synthesis Temperature on Manufacturing and Properties of SrSi2O2N2:Eu2+ Powders

38%

Pawlik T. , Michalik D. , Barzowska J. , Szczodrowski K. , Lesniewski T. , Sopicka-Lizer M. , Grinberg M.

2017

tom Vol. 62, iss. 2A

687--690

This paper presents the results of the synthesis temperature on the properties of the ceramic powders of SrSi2O2N2:Eu2+ obtained by the solid-phase reaction. Synthesis was carried out in the temperature range of 1250-1650°C for 2 hours in nitrogen flow in the reducing atmosphere of the graphite furnace. The phases present in the resultant powders were identified by X-ray structural analysis (XRD). Scanning electron microscopy (SEM) was used to examine the changes in the powder morphology as a result of the synthesis. The excitation and emission spectra measurements let to study phosphor photoluminescence properties. The results show the strong influence of temperature synthesis on the formation and purity of expected phases. The synthesis temperature also affects the luminescent properties of SrSi2O2N2:Eu2+ ceramic powders.