Picosecond dynamics of photoexcited carriers in interacting silicon nanocrystals

Kořínek, M.; Trojánek, F.; Hiller, Daniel; Gutsch, Sebastian; Zacharias, Margit; Kübel, Christian; Malý, P.

doi:10.1016/j.apsusc.2016.03.121

Cited by 5 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Parameters B and C for each sample can be determined from fitting the data measured under the highest and lowest pump fluence. The initial carrier density N 0 was estimated using the procedure described in 13 . For intermediate pump powers, we fix the B and C and our fitting parameters are N 0 and y 0 .…”

Section: Resultsmentioning

confidence: 99%

Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices

Chlouba

Trojánek

Laube

et al. 2018

Sci Rep

View full text Add to dashboard Cite

We report results of investigating carrier recombination in silicon nanocrystal/silicon dioxide superlattices. The superlattices prepared by nitrogen-free plasma enhanced chemical vapour deposition contained layers of silicon nanocrystals. Femtosecond transient transmission optical spectroscopy was used to monitor carrier mechanisms in the samples. The three-particle Auger recombination was observed in accord with previous reports. However, under high pump intensities (high photoexcited carrier densities) the bimolecular process dominated the recombination. Detailed analysis of measured data and fitting procedure made it possible to follow and quantify the interplay between the two recombination processes. The bimolecular recombination was interpreted in terms of the trap-assisted Auger recombination.

show abstract

Section: Resultsmentioning

confidence: 99%

Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices

Chlouba

Trojánek

Laube

et al. 2018

Sci Rep

View full text Add to dashboard Cite

show abstract

“…It should be noted that the PL lifetimes discussed in this work are in the range of 1–10 μs, which is many orders of magnitude longer than the characteristic time of Auger recombination in Si QD assemblies. 35 FRET is a donor deexcitation mechanism with rate k T that competes with the radiative and nonradiative decay mechanisms of the excited donor state. The efficiency of energy transfer ( E ) 36 is the fraction of photons absorbed by the donor which are transferred to the acceptor.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photoluminescence of silicon quantum dots in the presence of both energy transfer enhancement and emission enhancement mechanisms assisted by the double plasmon modes of gold nanorods

Cao

Zhang

et al. 2021

Nanoscale Adv.

View full text Add to dashboard Cite

show abstract

Controlling Energy Transfer in Silicon Quantum Dot Assemblies Made from All-Inorganic Colloidal Silicon Quantum Dots

2016

View full text Add to dashboard Cite

The optical response of an assembly of semiconductor quantum dots (QDs) is strongly modified from those of isolated ones by the inter-QD coupling. The strength of the coupling depends on the size, the inter-QD distance and the number of interacting QDs. In this work, we control these parameters of silicon (Si) QD assemblies by layer-by-layer growth of all-inorganic colloidal Si QDs. We perform detailed photoluminescence (PL) and PL decay dynamics studies for the assemblies made from monolayers of Si QDs 3.0 and 6.8 nm in diameters by precisely controlling the interlayer distance and the number of layers. From the analysis of the data with the Forster resonance energy transfer (FRET) model, we quantitatively discuss the relation between the FRET efficiency and the Forster radius in Si QD assemblies.

show abstract

Picosecond dynamics of photoexcited carriers in interacting silicon nanocrystals

Cited by 5 publications

References 46 publications

Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices

Interplay of bimolecular and Auger recombination in photoexcited carrier dynamics in silicon nanocrystal/silicon dioxide superlattices

Enhanced photoluminescence of silicon quantum dots in the presence of both energy transfer enhancement and emission enhancement mechanisms assisted by the double plasmon modes of gold nanorods

Controlling Energy Transfer in Silicon Quantum Dot Assemblies Made from All-Inorganic Colloidal Silicon Quantum Dots

Contact Info

Product

Resources

About