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arXiv · 0911.5025

Magnetic field-modulated exciton generation in organic semiconductors: an intermolecular quantum correlation effect

B. F. Ding·Y. Yao·X. Y. Sun·Z. Y. Sun·X. D. Gao·Z. T. Xie·Z. J. Wang·X. M. Ding·Y. Z. Wu·X. F. Jin·C. Q. Wu·X. Y. Hou
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Abstract

Magnetoelectroluminescence (MEL) of organic semiconductor has been experimentally tuned by adopting blended emitting layer consisting of both hole and electron transporting materials. A theoretical model considering intermolecular quantum correlation is proposed to demonstrate two fundamental issues: (1) two mechanisms, spin scattering and spin mixing, dominate the two different steps respectively in the process of the magnetic field modulated generation of exciton; (2) the hopping rate of carriers determines the intensity of MEL. Calculation successfully predicts the increase of singlet excitons in low field with little change of triplet exciton population.

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B. F. Ding, Y. Yao, X. Y. Sun, Z. Y. Sun, X. D. Gao, Z. T. Xie, Z. J. Wang, X. M. Ding, Y. Z. Wu, X. F. Jin, C. Q. Wu, X. Y. Hou. 2009-11-26. Magnetic field-modulated exciton generation in organic semiconductors: an intermolecular quantum correlation effect. https://doi.org/10.1103/physrevb.82.205209

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