Photo-induced charge transfer across the interface between organic molecular crystals and polymers

Details Photo-induced charge transfer across the interface between organic molecular crystals and polymers Photo-induced charge transfer across the interface between organic molecular crystals and polymers

2004-11-23

arxiv.org/abs/cond-mat/0411568v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevLett.95.016602

Photo-induced charge transfer of positive and negative charges across the interface between an ordered organic semiconductor and a polymeric insulator is observed in the field-effect experiments. Immobilization of the transferred charge in the polymer results in a shift of the field-effect threshold of polaronic conduction along the interface in the semiconductor, which allows for direct measurements of the charge transfer rate. The transfer occurs when the photon energy exceeds the absorption edge of the semiconductor. The direction of the transverse electric field at the interface determines the sign of the transferred charge; the transfer rate is controlled by the field magnitude and light intensity.

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