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VOLUME 41 (1985) | ISSUE 8 | PAGE 343
Quasi-2D and free excitons in quantum-well structures
The electrons and holes which are photoexcited in quantum wells relax separately, and quasi-2.D excitons are formed from the thermalized carriers. Above-barrier excitation gives rise to freed excitons, which effectively collect in quantum wells and give rise to an intense emission of quasi-2Z) excitons.