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Exciton self-trapping in tetrafluoro-dimethyl-aminoacridine single crystals
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10.1063/1.2735622
/content/aip/journal/jcp/126/23/10.1063/1.2735622
http://aip.metastore.ingenta.com/content/aip/journal/jcp/126/23/10.1063/1.2735622
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color) (a) DMAA molecule and directions of the molecular axes. (b) Absorption spectrum of DMAA in solution at room temperature. Inset: energy, oscillator strength, and direction cosines of the lowest calculated electronic transitions of the isolated DMAA molecule. (c) Room-temperature absorption spectra collected at normal incidence on the face of a DMAA single crystal with the electric field along either the or the principal axis and collected at 30° and 60° angles of incidence on the face, with as plane of incidence and polarized light. Inset: sketch of the packing of the molecules in the crystal as viewed from the face, and of the orientation of the and principal axes lying in the plane.

Image of FIG. 2.
FIG. 2.

Absorbance spectra of a DMAA crystal at room temperature and at with polarized light at normal incidence, together with the results of the linear fit which allows us to deduce the corresponding parameters , and in turn by Eq. (1).

Image of FIG. 3.
FIG. 3.

PL spectra of a DMAA crystal as taken at different temperatures. Inset: PL spectra on an enlarged scale and scheme of the potential energy curve in configurational coordinates for self-trapped (ST) and free excitons.

Image of FIG. 4.
FIG. 4.

Width at the DMAA emission band vs temperature. Inset: corresponding DMAA PL spectra.

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/content/aip/journal/jcp/126/23/10.1063/1.2735622
2007-06-15
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Exciton self-trapping in tetrafluoro-dimethyl-aminoacridine single crystals
http://aip.metastore.ingenta.com/content/aip/journal/jcp/126/23/10.1063/1.2735622
10.1063/1.2735622
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