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Separate charge transport pathways determined by the time of flight method in bimodal polytriarylamine
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10.1063/1.3054180
/content/aip/journal/jap/105/1/10.1063/1.3054180
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/1/10.1063/1.3054180

Figures

Image of FIG. 1.
FIG. 1.

Chemical structure of PTAA.

Image of FIG. 2.
FIG. 2.

Chain length distribution in bimodal PTAA (PTAA-B) and monomodal samples PTAA-MS and PTAA-ML.

Image of FIG. 3.
FIG. 3.

Photocurrent transients in a thick film of PTAA-B at different applied biases (10 V upper curve, 6 V lower curve) showing both slow and fast arrival times ( and , respectively) scaling correctly with electric field. The curves have been displaced vertically for clarity, and dotted lines added as a guide to the eyes.

Image of FIG. 4.
FIG. 4.

Hole mobilities calculated from the fast arrival times, parametric in electric field and temperature in PTAA-B.

Image of FIG. 5.
FIG. 5.

Hole mobilities calculated from the slow arrival times, parametric in electric field and temperature in PTAA-B.

Image of FIG. 6.
FIG. 6.

Hole photocurrent transients in a thick film of PTAA-MS at different applied biases (19 V upper curve, 10 V lower curve). There was no dispersive arrival time observed at longer time scales.

Image of FIG. 7.
FIG. 7.

Hole mobilities, parametric in electric field and temperature in PTAA-MS.

Image of FIG. 8.
FIG. 8.

Hole photocurrent transients in a thick film of PTAA-ML at different applied biases (23 V upper curve, 10 V lower curve).

Image of FIG. 9.
FIG. 9.

Typical DMTA results obtained from PTAA-B showing two glass transition temperatures at 46 and .

Image of FIG. 10.
FIG. 10.

Short time hole photocurrent transients in a sample of PTAA-B in forward and reverse illumination (both at 10 V bias). The inset shows short time hole photocurrents in PTAA-B samples of different thicknesses (both at ).

Image of FIG. 11.
FIG. 11.

Long time hole photocurrent transients in a sample of PTAA-B in forward and reverse illumination (both at 10 V bias).

Image of FIG. 12.
FIG. 12.

Hole mobilities obtained from the fast arrival times in PTAA-B at room temperature compared with those obtained from the single arrival time in PTAA-MS and the slow mobilities obtained from PTAA-B compared with those from PTAA-ML. Results for fast and slow transport in PTAA-blend are also included.

Image of FIG. 13.
FIG. 13.

Photocurrent transients in a thick film of PTAA-blend at different applied biases (10 V upper curve, 6 V lower curve), showing both slow and fast arrival times ( and , respectively). Composite plot of four photocurrents, the curves have been displaced vertically for clarity, and dotted lines are added as a guide to the eyes.

Image of FIG. 14.
FIG. 14.

The natural logarithm of the zero field mobility vs for fast and slow transport in PTAA-B.

Image of FIG. 15.
FIG. 15.

The electric field dependence of the mobility vs for fast and slow transport in PTAA-B.

Tables

Generic image for table
Table I.

Summary of transport parameters derived by the CDM model.

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/content/aip/journal/jap/105/1/10.1063/1.3054180
2009-01-05
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Separate charge transport pathways determined by the time of flight method in bimodal polytriarylamine
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/1/10.1063/1.3054180
10.1063/1.3054180
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