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Substrate/semiconductor interface effects on the emission efficiency of luminescent polymers
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10.1063/1.3622143
/content/aip/journal/jap/110/4/10.1063/1.3622143
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/4/10.1063/1.3622143

Figures

Image of FIG. 1.
FIG. 1.

Absorbance spectra for LBL PPV/DBS films with 5, 25, 50, and 75 bilayers thermally treated at (a) 230 °C and (b) 110 °C. The inset presents the absorbance intensity at 420 nm in function of the number of bilayers.

Image of FIG. 2.
FIG. 2.

Photoluminescence intensity for LBL PPV/DBS films with 5, 25, 50, and 75 bilayers thermally treated at (a) 230 °C and (b) 110 °C. The curves were normalized to unity.

Image of FIG. 3.
FIG. 3.

Integrated photoluminescence intensity (IPL) spectra for LBL PPV/DBS films with 5, 25, 50, and 75 bilayers thermally treated at (a) 230 °C and (b) 110 °C in function of sample temperature from 15 to 300 K.

Image of FIG. 4.
FIG. 4.

Photoluminescence excitation (PLE) spectra at room temperature normalized by the number of bilayers (NL) for LBL PPV/DBS films thermally treated at (a) 230 °C and (b) 110 °C.

Image of FIG. 5.
FIG. 5.

Model of Fabry–Pérot interferometer like for light propagation across the samples.

Tables

Generic image for table
Table I.

Ratio A(420 nm)/A(350 nm), spectral mass center (λ SMC), thickness, and root-mean-square roughness (σrms) for PPV/DBS LBL films in function of the number of bilayers (NL).

Generic image for table
Table II.

Huang–Rhys parameter (S ∼ I 1 /I 0) for LBL PPV/DBS films vs number of bilayers. I 1 and I 0 are the PL intensity (Fig. 2) at the pure electronic transition (∼510 nm) and at the first vibrational transition (∼550 nm), respectively.

Generic image for table
Table III.

Best fit parameters for the temperature dependence of the PL intensity.

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/content/aip/journal/jap/110/4/10.1063/1.3622143
2011-08-19
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Substrate/semiconductor interface effects on the emission efficiency of luminescent polymers
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/4/10.1063/1.3622143
10.1063/1.3622143
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