Volume 202, Issue 2 pp. 1013-1020
Research Article

Time-Resolved Photoluminescence Measurements on ZnSe–ZnTe Superlattices

K. Suzuki

K. Suzuki

Institut für Festkörperphysik, Universität Bremen, P.O. Box 330440, D-28334 Bremen, Germany

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K. Wundke

K. Wundke

Institut für Festkörperphysik, Universität Bremen, P.O. Box 330440, D-28334 Bremen, Germany

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G. Bley

G. Bley

Institut für Festkörperphysik, Universität Bremen, P.O. Box 330440, D-28334 Bremen, Germany

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U. Neukirch

U. Neukirch

Institut für Festkörperphysik, Universität Bremen, P.O. Box 330440, D-28334 Bremen, Germany

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J. Gutowski

J. Gutowski

Institut für Festkörperphysik, Universität Bremen, P.O. Box 330440, D-28334 Bremen, Germany

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N. Takojima

N. Takojima

Hokkaido Institute of Technology, Teine, Sapporo 006, Japan

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T. Sawada

T. Sawada

Hokkaido Institute of Technology, Teine, Sapporo 006, Japan

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K. Imai

K. Imai

Hokkaido Institute of Technology, Teine, Sapporo 006, Japan

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Abstract

Time-resolved photoluminescence of ZnSe–ZnTe superlattices with different Te concentrations has been measured in the picosecond time region. The samples show typical S1 (blue band) and S2 (green band) emissions in the time-integrated spectra. In the time-resolved spectra, both samples exhibit an asymmetrically broadened shallow component at the high-energy side of the luminescence band, indicating the presence of shallow localized excitons due to long-range potential fluctuations.

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