In this work we report the time dependence emission properties of photoexcited carriers in CdTe tetrapod nanocrystals, by using time-resolved photoluminescence spectroscopy. The emission dynamics of the ground and excited state of a tetrapod-structure have pointed out different temporal behaviours ascribed to different carrier relaxation mechanisms. By monitoring the transient emission spectra at different delay times, a remarkable change in the energy position of the lower energy state has been observed, attributable to a photoinduced screening of an internal electric field, originating, in turn, from the ground state charge separation. © 2009 American Institute of Physics.
Study of the radiative recombination processes in tetrapod-shaped CdTe nanocrystals
Morello G.
;Carbone L.;Manna L.;De Giorgi M.
2009
Abstract
In this work we report the time dependence emission properties of photoexcited carriers in CdTe tetrapod nanocrystals, by using time-resolved photoluminescence spectroscopy. The emission dynamics of the ground and excited state of a tetrapod-structure have pointed out different temporal behaviours ascribed to different carrier relaxation mechanisms. By monitoring the transient emission spectra at different delay times, a remarkable change in the energy position of the lower energy state has been observed, attributable to a photoinduced screening of an internal electric field, originating, in turn, from the ground state charge separation. © 2009 American Institute of Physics.| File | Dimensione | Formato | |
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