scholarly journals Photoluminescence properties of Yb2+ ions doped in the perovskites CsCaX3 and CsSrX3 (X = Cl, Br, and I) – a comparative study

2016 ◽  
Vol 18 (19) ◽  
pp. 13196-13208 ◽  
Author(s):  
Markus Suta ◽  
Werner Urland ◽  
Claude Daul ◽  
Claudia Wickleder
Keyword(s):  
Optical Properties ◽  
High Resolution ◽  
Comparative Study ◽  
Lanthanide Ions ◽  
Photoluminescence Spectra ◽  
Photoluminescence Properties ◽  
Detailed Understanding ◽  
Host Lattices ◽  
Divalent Lanthanide

Photoluminescence spectra of Yb2+ ions doped into CsCaX3 and CsSrX3 (X = Cl, Br, and I) depict a manifold of transitions in high resolution, which allows a detailed understanding of the optical properties of divalent lanthanide ions in perovskite host lattices.

SYNTHESIS AND PHOTOLUMINESCENCE PROPERTIES OF Er3+, Eu3+ IONS ACTIVATED SrAl12O19

2006 ◽  
Vol 20 (29) ◽  
pp. 4891-4898 ◽  
Author(s):  
VIJAY SINGH ◽  
JUN-JIE ZHU
Keyword(s):  
Optical Properties ◽  
Combustion Method ◽  
Photoluminescence Spectra ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Aluminate Phosphor

Synthesis of Er 3+, Eu 3+ ions activated strontium hexa-aluminate phosphor using the combustion method is described. An efficient phosphor can be prepared by this method at reaction temperatures as low as 500°C in a few minutes. Powder X-ray diffraction and the optical properties were studied by photoluminescence spectra.

scholarly journals High-Resolution Raman and Luminescence Spectroscopy of Isotope-Pure 28Si12C, Natural and 13C – Enriched 4H-SiC

2014 ◽  
Vol 778-780 ◽  
pp. 471-474 ◽  
Author(s):  
Ivan G. Ivanov ◽  
Milan Yazdanfar ◽  
Bjorn Lundqvist ◽  
Jr Tai Chen ◽  
Jawad ul Hassan ◽  
...  
Keyword(s):  
Optical Properties ◽  
High Resolution ◽  
Brillouin Zone ◽  
Laser Excitation ◽  
Tunable Laser ◽  
Luminescence Spectroscopy ◽  
Photoluminescence Spectra ◽  
Qualitative Comparison

The optical properties of isotope-pure28Si12C, natural SiC and enriched with13C isotope samples of the 4H polytype are studied by means of Raman and photoluminescence spectroscopies. The phonon energies of the Raman active phonons at the Γ point and the phonons at the M point of the Brillouin zone are experimentally determined. The excitonic bandgaps of the samples are accurately derived using tunable laser excitation and the phonon energies obtained from the photoluminescence spectra. Qualitative comparison with previously reported results on isotope-manipulated Si is presented.

Theoretical And Practical Design Considerations for Ultra-High Resolution Electron Lenses

1980 ◽  
Vol 38 ◽  
pp. 266-269
Author(s):  
Y. Harada ◽  
K. Tsuno ◽  
Y. Arai
Keyword(s):  
Optical Properties ◽  
High Resolution ◽  
Chromatic Aberration ◽  
Point Of View ◽  
Pole Piece ◽  
Axial Field ◽  
Design Considerations ◽  
Resolution Electron ◽  
Practical Design ◽  
Peak Flux

Magnetic objective lenses, from the point of view of pole piece geometry, can he roughly classified into two types, viz., symmetrical and asymmetrical. In the case of the former, the optical properties have been calculated by several authors1-3) and the results would appear to suggest that, in order to reduce the spherical and chromatic aberration coefficients, Cs and Cc, it is necessary to decrease the half-width value of the axial field distribution and to increase the peak flux density. The expressions for either minimum Cs or minimum Cc were presented in the form of ‘universal’ curves by Mulvey and Wallington4).

Effects of Gamma Irradiation on Optical Properties of Colloidal Nanocrystals

2007 ◽  
Vol 1038 ◽  
Author(s):  
Nathan J Withers ◽  
Krishnaprasad Sankar ◽  
Brian A. Akins ◽  
Tosifa A. Memon ◽  
Jiangjiang Gu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Gamma Irradiation ◽  
Irradiation Dose ◽  
Nanocrystalline Material ◽  
Light Output ◽  
Colloidal Nanocrystals ◽  
Photoluminescence Intensity ◽  
Photoluminescence Properties ◽  
Material Systems ◽  
Dose Radiation

AbstractThe effects of 137Cs gamma irradiation on photoluminescence properties, such as spectra, light output, and lifetime, of several types of colloidal nanocrystals have been investigated. Irradiation-induced damage testing was performed on CdSe/ZnS, LaF3:Eu, LaF3:Ce, ZnO, and PbI2 nanocrystals synthesized on a Schlenk line using appropriate solvents and precursors. Optical degradation of the nanocrystals was evaluated based on the measured dependence of their photoluminescence intensity on the irradiation dose. Radiation hardness varies significantly between various nanocrystalline material systems.

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