Journal
APPLIED PHYSICS LETTERS
Volume 79, Issue 13, Pages 1980-1982Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1405152
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The interdiffusion effects on the band alignment of the GeSi dots embedded in Si matrix were studied by temperature- and excitation-power-dependent photoluminescence measurements. A different power-dependent behavior of the photoluminescence for the as-grown and the annealed samples was observed. It was suggested that the band alignments of the dots changed from type II to type I after annealing due to the Ge/Si interdiffusion. The decrease of the valence band offset, which was also induced by the Ge/Si interdiffusion, was observed from the temperature-dependent photoluminescence measurements. (C) 2001 American Institute of Physics.
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