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Effect of exciton migration on the light emission properties in silicon nanocrystal ensembles
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10.1063/1.3138811
/content/aip/journal/jap/105/11/10.1063/1.3138811
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/11/10.1063/1.3138811

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic representation of sample C. The sample is composed of virtual vertical columns with very tiny Si NCs (dark dots) embedded in a matrix. The matrix is represented by the gray color between the NCs. (b) HRTEM image taken from sample C.

Image of FIG. 2.
FIG. 2.

HRTEM images obtained from (a) film B and (b) film D.

Image of FIG. 3.
FIG. 3.

PL spectra obtained from films A–D at 70 K.

Image of FIG. 4.
FIG. 4.

PL spectra obtained at different temperatures from films (a) A, (b) B, and (c) C.

Image of FIG. 5.
FIG. 5.

PL intensity normalized to the maximum value as a function of temperature for films A–C.

Image of FIG. 6.
FIG. 6.

PL decay times at different temperatures as extracted from stretched exponential fittings to the experimental PL decay curves for films A–D. Insert: An example of stretched exponential fitting (solid line) to the experimental PL decay curve (open circles) obtained from film A at 70 K.

Image of FIG. 7.
FIG. 7.

Dispersion factor at different temperatures as extracted from stretched exponential fitting to the experimental decay curves for films A–D.

Tables

Generic image for table
Table I.

Electrochemical growth conditions and characteristics of the porous Si films.

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/content/aip/journal/jap/105/11/10.1063/1.3138811
2009-06-03
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of exciton migration on the light emission properties in silicon nanocrystal ensembles
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/11/10.1063/1.3138811
10.1063/1.3138811
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