Trap distribution and the impact of oxygen-induced traps on the charge transport in poly(3-hexylthiophene)

By Julia Schafferhans, Andreas Baumann, Carsten Deibel, VI VladimirDyakonovExperimentalPhysics, F. O. Physics, Astronomy, Julius-Maximilians-Universitat Wurzburg, Wurzburg, Heidelberg · Germany, Zae Bayern and 1 more. 2008

137 citations recorded by the source corpus.

The trap distribution in the conjugated polymer poly(3-hexylthiophene) was investigated by fractional thermally stimulated current measurements. Two defect states with activation energies of about 50 and 105 meV and Gaussian energy distributions were revealed. The first is assigned to the tail of the intrinsic density of states, whereas the concentration of the second trap is directly related to oxygen exposure. The impact of the oxygen induced traps on the charge transport was examined by performing photo-induced charge carrier extraction by linearly increasing voltage measurements that exhibited a strong decrease in the mobility with air exposure time.

Subfields: Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/c1893ca0feab17a4ea4b50af2a5c3d76462b29a9

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In Electrical and Electronic Engineering

1. V. Dyakonov
2. Carsten Deibel
3. Andreas Baumann
4. Julia Schafferhans
5. A. Wagenpfahl

In Polymers and Plastics

1. Carsten Deibel
2. V. Dyakonov
3. A. Wagenpfahl

Citations in the corpus

• Polymer–fullerene bulk heterojunction solar cells (2010, background): “The charge carrier mobility in the blend was shown to decrease only slightly, in contrast to pure P3HT [218].”
• Oxygen doping of P3HT:PCBM blends: Influence on trap states, charge carrier mobility and solar cell performance (2010, methodology): “Further details of the TSC measurements are described elsewhere [10].”