Generation of electron spin polarization in disordered organic semiconductors

Details Generation of electron spin polarization in disordered organic semiconductors Generation of electron spin polarization in disordered organic semiconductors

2012-04-09

arxiv.org/abs/1204.1882v1

Physics

Condensed Matter

Materials Science

10 pages, 3 figures

Scientific paper

The generation mechanisms of electron spin polarization (ESP) of charge carriers (electrons and holes, called "doublets") in doublet-doublet recombination and triplet-doublet quenching in disordered organic semiconductors are analyzed in detail. The ESP is assumed to result from quantum transitions between the states of the spin Hamiltonian of the pair of interacting particles. The value of the ESP is essentially determined by the mechanism of relative motion of particles. In our work we have considered the cage and free diffusion models. The effect of possible attractive spin-independent interactions between particles is also analyzed. Estimation with obtained formulas shows that the proposed mechanisms can lead to a fairly strong ESP much larger than the thermal one (at room temperatures)

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