Changing inter-molecular spin-orbital coupling for generating magnetic field effects in phosphorescent organic semiconductors
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Data
2012-01-02
Autores
Yan, Liang
Shao, Ming
Graeff, Carlos Frederico de Oliveira [UNESP]
Hummelgen, Ivo
Ma, Dongge
Hu, Bin
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American Institute of Physics (AIP)
Resumo
Phosphorescent organic semiconductors normally show negligible magnetic field effects in electronic and optic responses. These phenomena have been generally attributed to strong spin-orbital coupling which can dominate internal spin-dephasing process as compared with applied magnetic field. This paper reports both positive and negative magnetocurrents from phosphorescent organic semiconductors through dissociation and charge-reaction channels when the intermolecular spin-orbital coupling is changed based on materials mixing. Our experimental results indicate that inter-molecular spin-orbital coupling is essentially responsible for the generation of magnetic field effects in phosphorescent organic semiconductors. (C) 2012 American Institute of Physics. [doi:10.1063/1.3673561]
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Applied Physics Letters. Melville: Amer Inst Physics, v. 100, n. 1, p. 3, 2012.