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Temperature effects on quasi-isolated conjugated polymers as revealed by temperature-dependent optical spectra of 16-mer oligothiophene diluted in a sold matrix
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10.1063/1.3152447
/content/aip/journal/jcp/130/23/10.1063/1.3152447
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/23/10.1063/1.3152447
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The chemical structure of 16-mer oligothiophene (16 T).

Image of FIG. 2.
FIG. 2.

Absorption spectra of 16 T diluted in PP measured at some chosen temperatures. The vertical broken line indicates the energy position of the 0-0 peak at 4 K.

Image of FIG. 3.
FIG. 3.

(a) Steady-state PL spectra of 16 T in PP measured at some chosen temperatures. (b) The best-fit results of simulation by the FC analysis for the PL spectra in (a). The vertical broken line for each figure indicates the energy position of the 0-0 peak at 4 K.

Image of FIG. 4.
FIG. 4.

Time-resolved PL spectra of 16 T in PP around the 0-0 peak measured at 298 K. The spectra were obtained by integrating signals over some time width. From the top, the integrated times are , , , , and . The average time in each spectrum is indicated in the figure. The spectra were scaled to give nearly the same PL intensity. The broken line in the figure indicates the position of the PL 0-0 peak in the steady-state PL spectrum.

Image of FIG. 5.
FIG. 5.

Plots of the average spectral shift of the time-resolved PL spectra measured at 4 and 298 K for 16 T in PP. The spectral shift is defined as a deviation of the spectral first moment from the spectrum at .

Image of FIG. 6.
FIG. 6.

Plots of the PL 0-0 peak of 16 T in PP obtained by the FC analyses against calculated from Eq. (4) in the text and the PL 0-0 peaks of 16 T dissolved in some liquid solvents (decalin, octane, cyclohexane, and xylene) obtained from each PL spectrum at room temperature.

Image of FIG. 7.
FIG. 7.

Temperature dependences of the 0-0 absorption and PL peaks of 16 T in PP.

Image of FIG. 8.
FIG. 8.

Temperature dependences of the effective ring number of 16 T in PP calculated from the values of the 0-0 absorption and PL peaks. The broken line is the result of simulation using Eq. (6) in the text.

Image of FIG. 9.
FIG. 9.

Temperature dependence of the mean phonon energy obtained from the FC analyses for the PL spectra of 16 T in PP.

Image of FIG. 10.
FIG. 10.

Temperature dependence of the mean Gaussian FWHM obtained from the FC analyses for the PL spectra of 16 T in PP. The solid curve indicates the best-fit result using the function of .

Image of FIG. 11.
FIG. 11.

Temperature dependence of the HR factor of 16 T in PP obtained from the FC analyses for the PL spectra and from the intensity ratio of the 0-1 peak to the 0-0 peak for absorption.

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/content/aip/journal/jcp/130/23/10.1063/1.3152447
2009-06-18
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Temperature effects on quasi-isolated conjugated polymers as revealed by temperature-dependent optical spectra of 16-mer oligothiophene diluted in a sold matrix
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/23/10.1063/1.3152447
10.1063/1.3152447
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