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Radiative recombination dynamics in tetrapod-shaped CdTe nanocrystals: Evidence for a photoinduced screening of the internal electric field
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10.1063/1.2924306
/content/aip/journal/apl/92/19/10.1063/1.2924306
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/19/10.1063/1.2924306

Figures

Image of FIG. 1.
FIG. 1.

Low magnification TEM image of tetrapod-shaped CdTe nanocrystals. The scale bar is long. Inset: PL recorded at room temperature.

Image of FIG. 2.
FIG. 2.

Typical normalized time resolved PL traces of GS (open symbols) and EX (full symbols) for CdTe tetrapods, recorded at and at excitation density of . The white lines represent the best fit to Eq. (1).

Image of FIG. 3.
FIG. 3.

Temporal evolution of the PL spectrum at excitation density of . The data were taken in a wide window. Dotted line is a guide for eyes evidencing the remarkable dynamical shift of the GS.

Image of FIG. 4.
FIG. 4.

(a) Temporal evolution of the GS and EX PL intensity ratio. (b) Plot of the dynamical shift of the GS emission energy (symbols) and relative best fit (continuous line) to a biexponential function. The data refer to the transient spectra reported in Fig. 3.

Tables

Generic image for table
Table I.

Best fit values of the lifetimes and the relative weights for the GS and for the EX as a function of the excitation density.

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/content/aip/journal/apl/92/19/10.1063/1.2924306
2008-05-13
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Radiative recombination dynamics in tetrapod-shaped CdTe nanocrystals: Evidence for a photoinduced screening of the internal electric field
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/19/10.1063/1.2924306
10.1063/1.2924306
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