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Doctoral thesis
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Photophysical properties of samarium (II) doped in inorganic crystals: effect of chemical environment, external pressure and temperature

Contributors

Pal, Prodipta

Directors

Hagemann, Hans-Rudolf

Defense date

2012-09-11

Abstract

The effects of the surroundings on the emission properties of Sm2+ ion in inorganic crystals are probed by high pressure experiments as well as by chemical substitution. The sharp f-f emissions of Sm2+ under high external pressure enable us to study the pressure effect on the crystal field energy levels. A routine program allows to refine free ion and CFP by minimizing the differences between the observed and calculated energy levels. The variations of the F2, ξ parameters as a function of pressure were discussed relative to central field covalency and symmetry restricted covalency models. Using the formalism of the superposition model as a function of pressure, we have calculated intrinsic crystal field parameters. Emission lifetime measurements were performed as a function of temperature and pressure. The temperature dependent experiments can be described by a contribution of both radiative and non-radiative pathways which involve also the lowest f-d level.

UNIGE affiliation entities

Citation (ISO format)

PAL, Prodipta. Photophysical properties of samarium (II) doped in inorganic crystals: effect of chemical environment, external pressure and temperature. Doctoral Thesis, 2012. doi: 10.13097/archive-ouverte/unige:24868

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Technical informations

Creation

13/12/2012 12:16:00

First validation

13/12/2012 12:16:00

Update

14/03/2023 17:48:38

Status update

14/03/2023 17:48:38

Last indexation

13/05/2025 16:08:13
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