Thickness dependence of organic magnetoconductance of polymeric semiconductor device based on an ambipolar polymer AnE-PVstat
Sprache des Titels:
Englisch
Original Kurzfassung:
We explore the magnetoconductance (MC) of polymer thin-film device, based on an anthracene containing poly
(p-phenylene-ethynylene)-alt-poly (p-phenylene-venylene) (PPE-PPV) denoted AnE-PVstat, for different thicknesses
to clarify the role of electron?hole (e?h) pairs on the MC effect. Here, by changing the thickness of the
active layer, we observed a positive MC which reaches up 1.5% at a magnetic field of 425 mT at room
temperature. We found that the increase of the thickness is accompanied by the decrease of the MC effect. To
analyze the experimental data, we used the electron?hole (e?h) pair model based on the Stochastic Liouville
Equation with spin mixing by hyperfine fields and different singlet and triplet recombination and dissociation
rates kS, kT, qS and qT. The theoretical calculations are well consistent with the experimental results.
Forschungs-