Observation of luminescence from bound multiexciton complexes in gallium doped germanium |
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| Authors: | G.A. Held E.E. Haller C.D. Jeffries |
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| Affiliation: | 1. Materials and Molecular Research Division, Lawrence Berkeley Laboratory, USA;2. Department of Physics, University of California, Berkeley, CA 94720, USA;3. Materials and Molecular Research Division, Lawrence Berkeley Laboratory, USA;4. Department of Materials Science and Mineral Engineering, College of Engineering, University of California, Berkeley, CA 94720, USA;5. Materials and Molecular Research Division, Lawrence Berkeley Laboratory, USA;6. Department of Physics, University of California, Berkeley, CA 94720, USA |
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| Abstract: | Spectrally resolved luminescence associated with the decay of bound multiexciton complexes in optically excited Ge:Ga is observed. This is the first reported observation of multiexciton complexes in p-type germanium. The observed spectra are consistent with the shell model for bound multiexciton complexes.No-phonon, TA, LA, and TO phonon assisted luminescence are observed. From these spectra, the energies of the LA, TA, and TO phonons in Ge:Ga are determined. |
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