Evidence for excitonic decay of excess charge carriers in high quality GaAs quantum wells at room temperature
- 14 July 1986
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 49 (2), 76-78
- https://doi.org/10.1063/1.97357
Abstract
A comparative study is presented of the room-temperature decay of laser excited microwave photoconductivity and of cathodoluminescence of high quality GaAs multiple quantum wells grown by molecular beam expitaxy and of high quality GaAs liquid phase epitaxial layers. The results from both experiments are in quantitative agreement and prove that carrier recombination in multiple quantum wells occurs via excitonic decay channels at excess carrier densities less than 1017 cm−3. In contrast, band-band recombination prevails in three-dimensional material.Keywords
This publication has 16 references indexed in Scilit:
- Temperature dependence of the radiative recombination coefficient in GaAs(Al, Ga)As quantum wellsSuperlattices and Microstructures, 1985
- Charge carrier dynamics in a-Si:HSolid State Communications, 1985
- Recombination-induced heating of free carriers in a semiconductorPhysical Review B, 1985
- Injection, intersubband relaxation and recombination in GaAs multiple quantum wellsJournal of Luminescence, 1985
- Excitons in GaAs quantum wellsJournal of Luminescence, 1985
- Oscillator strengths for excitons in quantum wells: free or bound to impuritiesSuperlattices and Microstructures, 1985
- Recombination Enhancement due to Carrier Localization in Quantum Well StructuresPhysical Review Letters, 1983
- Low-threshold continuous laser operation (300–337 °K) of multilayer MO-CVD AlxGa1−xAs-GaAs quantum-well heterostructuresApplied Physics Letters, 1978
- Quantum Efficiency and Radiative Lifetime of the Band-to-Band Recombination in Heavily Doped-Type GaAsPhysical Review B, 1972
- Optical Properties of n-Type GaAs. III. Relative Band-Edge Recombination Efficiency of Si- and Te-Doped Crystals before and after Heat TreatmentJournal of Applied Physics, 1969