6533b828fe1ef96bd1287b3e
RESEARCH PRODUCT
Thermal activated carrier transfer between InAs quantum dots in very low density samples
Benito AlénPaola FrigeriJuan P. Martínez-pastorLuca SeravalliDavid FusterS. FranchiGuillermo Muñoz-matutanoGiovanna TrevisiJosep Canet-ferrersubject
HistoryWork (thermodynamics)Condensed Matter::Otherbusiness.industryChemistryExcitonThermionic emissionElectron66.30.H- Self-diffusion and ionic conduction in nonmetals78.67.Hc Quantum dotsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectMolecular physicsComputer Science ApplicationsEducationCondensed Matter::Materials Science78.55.Cr III-V semiconductorsQuantum dotThermalOptoelectronics71.35.-y Excitons and related phenomenaDiffusion (business)businessRecombination79.40.+z Thermionic emissiondescription
In this work we develop a detailed experimental study of the exciton recombination dynamics as a function of temperature on QD-ensembles and single QDs in two low density samples having 16.5 and 25 dots/¼m2. We corroborate at the single QD level the limitation of the exciton recombination time in the smallest QDs of the distribution by thermionic emission (electron emission in transient conditions). A portion of these emitted carriers is retrapped again in other (larger) QDs, but not very distant from those emitting the carriers, because the process is limited by the diffusion length at the considered temperature.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-02-01 | Journal of Physics: Conference Series |