Carrier Capture by Quantum Wells via 3D→2D and 2D→2D Channels
Efficient charge carrier collection in quantum wells has been observed in a number of experiments (see, e.g. references in the review of Ridley 1991). In theoretical studies carrier capture has been usually investigated (Kozyrev and Shik, 1985; Brum and Bastard, 1986) as electron transitions from three-dimensional (3D) to two-dimensional (2D) states (see Fig. 1) due to optical phonon emission.
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