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Size-dependent band gap of colloidal quantum dots
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10.1063/1.2158502
/content/aip/journal/jap/99/1/10.1063/1.2158502
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/1/10.1063/1.2158502

Figures

Image of FIG. 1.
FIG. 1.

Effective band-gap energy for CdS dots as a function of the QD radius. The experimental data (Ref. 20) are plotted with symbols. The three curves correspond to theoretical results for different values of the confinement potential: (dotted curve), (solid curve), and (dashed curve).

Image of FIG. 2.
FIG. 2.

Comparison between experimental and calculated effective band-gap energies for three semiconductor Qds (CdSe, CdTe, and InP) as functions of the dot radius. The experimental data are plotted with symbols and the theoretical predictions with solid curves. The confinement potential is in all cases.

Image of FIG. 3.
FIG. 3.

Comparison between experimental and calculated effective band-gap energies for CdS semiconductor Qds as functions of the QD radius for dots capped in two different matrices. The experimental data are plotted with symbols and the theoretical predictions with curves. The cycles and solid curve correspond to the oleic acid matrix and the squares and dotted curve to the silicate glass matrix. The confinement potential is for the silicate glass matrix and for the oleic acid matrix.

Image of FIG. 4.
FIG. 4.

Comparison between experimental and calculated effective band-gap energies for InAs and PbSe narrow-gap semiconductor Qds as functions of the QD radius in two different matrices. The matrix for the InAs is the TOP∕TOPO matrix with band-gap energy at and the matrix for the PbSe is the phosphate glass with band-gap energy at . Hence the confinement potential is for the phosphate glass matrix and for the TOP∕TOPO matrix, which is in both cases 8% of band-gap energy of the matrix. The experimental data are plotted with symbols and the theoretical predictions with solid curves.

Tables

Generic image for table
Table I.

Material parameters used in the PPM calculations (Ref. 20).

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/content/aip/journal/jap/99/1/10.1063/1.2158502
2006-01-11
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Size-dependent band gap of colloidal quantum dots
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/1/10.1063/1.2158502
10.1063/1.2158502
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