scholarly journals Nano-engineered electron–hole exchange interaction controls exciton dynamics in core–shell semiconductor nanocrystals

2011 ◽  
Vol 2 (1) ◽  
Author(s):  
S. Brovelli ◽  
R.D. Schaller ◽  
S.A. Crooker ◽  
F. García-Santamaría ◽  
Y. Chen ◽  
...  
Keyword(s):  
Exchange Interaction ◽  
Semiconductor Nanocrystals ◽  
Core Shell ◽  
Electron Hole ◽  
Exciton Dynamics

Exciton dynamics in luminescent carbon nanodots: Electron–hole exchange interaction

Nano Research ◽  
2015 ◽  
Vol 9 (2) ◽  
pp. 549-559 ◽  
Author(s):  
Bo Peng ◽  
Xin Lu ◽  
Shi Chen ◽  
Cheng Hon Alfred Huan ◽  
Qihua Xiong ◽  
...  
Keyword(s):  
Exchange Interaction ◽  
Carbon Nanodots ◽  
Electron Hole ◽  
Exciton Dynamics

Wavefunction engineering in core-shell semiconductor nanocrystals: from fine-tuned exciton dynamics and suppressed Auger recombination to dual color electroluminescence

2012 ◽  
Author(s):  
Sergio Brovelli ◽  
Florencio García-Santamaría ◽  
Ranjani Viswanatha ◽  
Bhola N. Pal ◽  
Scott A. Crooker ◽  
...  
Keyword(s):  
Auger Recombination ◽  
Semiconductor Nanocrystals ◽  
Core Shell ◽  
Exciton Dynamics ◽  
Dual Color

Electrodynamical treatment of the electron-hole long-range exchange interaction in semiconductor nanocrystals

2003 ◽  
Vol 45 (4) ◽  
pp. 768-781 ◽  
Author(s):  
S. V. Goupalov ◽  
P. Lavallard ◽  
G. Lamouche ◽  
D. S. Citrin
Keyword(s):  
Exchange Interaction ◽  
Long Range ◽  
Semiconductor Nanocrystals ◽  
Electron Hole

scholarly journals Atomistic Tight-Binding Theory of Electron-Hole Exchange Interaction in Morphological Evolution of CdSe/ZnS Core/Shell Nanodisk to CdSe/ZnS Core/Shell Nanorod

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Worasak Sukkabot
Keyword(s):  
Exchange Interaction ◽  
Ground State ◽  
Heavy Hole ◽  
Morphological Evolution ◽  
Tight Binding ◽  
Core Shell ◽  
Binding Theory ◽  
Electron Hole ◽  
Aspect Ratios ◽  
The Impact

Based on the atomistic tight-binding theory (TB) and a configuration interaction (CI) description, the electron-hole exchange interaction in the morphological transformation of CdSe/ZnS core/shell nanodisk to CdSe/ZnS core/shell nanorod is described with the aim of understanding the impact of the structural shapes on the change of the electron-hole exchange interaction. Normally, the ground hole states confined in typical CdSe/ZnS core/shell nanocrystals are of heavy hole-like character. However, the atomistic tight-binding theory shows that a transition of the ground hole states from heavy hole-like to light hole-like contribution with the increasing aspect ratios of the CdSe/ZnS core/shell nanostructures is recognized. According to the change in the ground-state hole characters, the electron-hole exchange interaction is also significantly altered. To do so, optical band gaps, ground-state electron character, ground-state hole character, oscillation strengths, ground-state coulomb energies, ground-state exchange energies, and dark-bright (DB) excitonic splitting (stoke shift) are numerically demonstrated. These atomistic computations obviously show the sensitivity with the aspect ratios. Finally, the alteration in the hole character has a prominent effect on dark-bright (DB) excitonic splitting.

Effect of Electron–Hole Overlap and Exchange Interaction on Exciton Radiative Lifetimes of CdTe/CdSe Heteronanocrystals

ACS Nano ◽  
2016 ◽  
Vol 10 (4) ◽  
pp. 4102-4110 ◽  
Author(s):  
Andrés Granados del Águila ◽  
Esther Groeneveld ◽  
Jan C. Maan ◽  
Celso de Mello Donegá ◽  
Peter C. M. Christianen
Keyword(s):  
Exchange Interaction ◽  
Electron Hole ◽  
Radiative Lifetimes
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