| Zugriffsnummer | 44207 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Effect of disorder on exciton dynamics in cation-substituted ZnxCd1-xS mixed crystals |
| Autor(in); Institution |
Shevel, S.; National Academy of Sciences of Ukraine, Institute of Physics, Kyiv, UKRAINE
Euteneuer, A.; Philipps University, Fachbereich Physik, AG Halbleiterphysik, Marburg, GERMANY
Hellmann, R.; Philipps University, Fachbereich Physik, AG Halbleiterphysik, Marburg, GERMANY
Göbel, Ernst Otto; Präsidium, P, PTB-Braunschweig
Vozny, V.; National Academy of Sciences of Ukraine, Institute of Physics, Kyiv, UKRAINE
Vytrykhivsky, M.; National Academy of Sciences of Ukraine, Institute of Semiconductor Physics, Kyiv, UKRAINE
Petri, W.; University of Karlsruhe, Institut für Angewandte Physik, Karlsruhe, GERMANY
Klingshirn, C.; Institut für Angewandte Physik, University of Karlsruhe, Karlsruhe, GERMANY
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| Quelle/Jahr | Physica Status Solidi B: 205 (1998), 2, 667 - 681 |
| ISSN | 0370-1972 (PRINT) ; 1521-3951 (ONLINE) |
| DOI | |
| Verlag | Berlin: Wiley-VCH |
| Zusammenfassung | Time‐integrated and time‐resolved (temporal resolution ≈20 ps) excitonic luminescence of cation‐substituted ZnxCd1-xS (0 ≤ x ≤ 0.6) platelet mixed crystals has been studied at T = 1.8 K. It is shown that the evolution of exciton spectra with the increase of x is not simply governed by "disorder‐induced broadening" (spread of exciton resonance frequency). Luminescence transients are analyzed to clarify the relative importance of tunneling (usually associated with the localization of excitons by disorder that is known to dominate in the model anion‐substituted system CdSeyS1-y). Tunneling in the range of Zn content x ≤ 0.3 is ruled out whereas the indisputable evidences of it (though on a substantially shorter timescale than in CdSeyS1-y) are found for the samples with x = 0.34 and 0.41. Both at small and large Zn contents different temporal behavior is observed compared to CdSeyS1-y implying some persistence of impurity‐bound excitons. It is suggested that in cation‐substituted ZnxCd1-xS the inhomogeneously broadened levels of impurity‐bound excitons also participate in the tunneling and relaxation processes whereas the role of disorder‐induced fluctuations of the crystal potential is less important than in anion‐substituted CdSeyS1-y. |
Zitierung
Shevel, S., Euteneuer, A., Hellmann, R., Göbel, E. O., Vozny, V., Vytrykhivsky, M., Petri, W., & Klingshirn, C. (1998). Effect of disorder on exciton dynamics in cation-substituted ZnxCd1-xS mixed crystals. Physica Status Solidi B, 205(2), 667–681. https://doi.org/10.1002/(sici)1521-3951(199802)205:2%3c667::aid-pssb667%3e3.0.co;2-2