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  Rôle of the Jahn-Teller Coupling in the Luminescence Spectra of Fe2+ in Zinc-Blende Compounds

Vogel, E. E., Mualin, O., Schulz, H.-J., & Thiede, M. (1997). Rôle of the Jahn-Teller Coupling in the Luminescence Spectra of Fe2+ in Zinc-Blende Compounds. Zeitschrift für Physikalische Chemie, 201(1-2), 99-109. doi:10.1524/zpch.1997.201.Part_1_2.099.

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10.1524_zpch.1997.201.part_1_2.099.pdf (Verlagsversion), 2MB
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1997
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De Gruyter
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 Urheber:
Vogel, E. E.1, Autor
Mualin, O.1, Autor
Schulz, Hans-Joachim2, Autor           
Thiede, M.2, Autor           
Affiliations:
1Departamento de Física, Universidad de La Frontera, RCH-Temuco, Chile, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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 Zusammenfassung: The luminescence spectra of Fe2+ in zinc-blende-type II—VI and III—V compounds do not show an equally spaced set of emission lines as predicted by spin orbit interaction in a plain crystalline field. The unequal separation between these lines is a signature of the Jahn-Teller effect in these systems. Attention is focused here on the general trend of the 5 E-derived energy levels providing the end states for the emission transitions. The intervall between the second and third energy levels (γ4 and γ3) is employed as a sensitive
test based on the two following characteristics: First, this is the spacing that varies the most; second, the emissions to these levels are usually quite sharp as they involve energies not overlapping with phonon-assisted transitions. This property is studied in the plane [hω,EJT] (energy of the coupling phonon and the Jahn-Teller energy which is directly
related to the coupling strength). The general behaviour is then studied under different theoretical conditions, in particular those that maximize the effect. Application of this theory to each real compound is thus possible by choosing the right combination of the two variables. To this end, the examples of luminescent substitutional Fe2+ ions in ZnS,
ZnTe, and CdTe are discussed based on published spectra. The main emphasis is placed on new precise measurements of the ZnSe : Fe2+ emission. With crystals containing different iron concentrations, changing line shapes, including self-inversion of several emission
lines, have been obtained in the 2600 to 2800 cm-1 spectral range. The properties of the four host/impurity systems are satisfactorily explained while an overall description emerges for the whole family of these compounds from a compilation of the derived coupling parameters.

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Sprache(n): eng - English
 Datum: 1996-08-241997-05-30
 Publikationsstatus: Erschienen
 Seiten: 11
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1524/zpch.1997.201.Part_1_2.099
 Art des Abschluß: -

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Titel: Zeitschrift für Physikalische Chemie
  Andere : Zeitschrift für Physikalische Chemie: International journal of research in physical chemistry and chemical physics
  Kurztitel : Zeitschr. Phys. Chem.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Oldenbourg : Walter de Gruyter GmbH
Seiten: 11 Band / Heft: 201 (1-2) Artikelnummer: - Start- / Endseite: 99 - 109 Identifikator: ISSN: 0942-9352
CoNE: https://pure.mpg.de/cone/journals/resource/09429352