- PII
- 10.31857/S0044451024060014-1
- DOI
- 10.31857/S0044451024060014
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 165 / Issue number 6
- Pages
- 757-766
- Abstract
- For the electronic subsystem of transition metal ions embedded in a crystal lattice or formed a complex with ligands, an effective decrease in interelectron repulsion is observed compared to free ions, which in modern literature is referred to as the nephelauxetic effect. In this work, we study the role of the nephelauxetic effect in the Fe2+ ions electronic spectrum formation in CdTe and ZnSe matrices. Experimental assessment of the corresponding corrections was carried out based on the analysis of two transitions – the well-known 5T2(5D) → 5E(5D), enabling us to record the magnitude of the crystal field, and the less studied 3T1(3H) → 5E(5D). The discovery of the zero-phonon line of this transition in CdTe:Fe enabled us to compare the two luminescent systems properties and demonstrate that for the Fe2+ ion in CdTe the nephelauxetic effect role increases noticeably. Based on the experimental data obtained in combination with calculations within crystal field theory, we have refined the values of the Racah parameters for Fe2+ ions in CdTe and ZnSe matrices. The role of the nephelauxetic effect for Fe2+ ions in two matrices similar in structure is important both for practical problems related to IR laser systems improvement, and for resolving some fundamental questions of quantum chemistry.
- Keywords
- transition metal ions crystal lattice crystal field nephelauxetic effect CdTe ZnSe
- Date of publication
- 15.06.2024
- Year of publication
- 2024
- Number of purchasers
- 0
- Views
- 112
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