Journal
APPLIED PHYSICS LETTERS
Volume 89, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2358967
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The dependence of carrier lifetime on resistivity and carrier injection level in germanium crystals is studied using microwave probing of optically excited samples. Bulk lifetimes in the range between 30 ns and 500 mu s are measured. The carrier lifetime decreases with decreasing resistivity and increases with increasing excitation level. Possible mechanisms are discussed and it is shown that the carrier recombination transients are driven by a system of recombination and trapping centers. (c) 2006 American Institute of Physics.
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