Otro
Changing inter-molecular spin-orbital coupling for generating magnetic field effects in phosphorescent organic semiconductors
Registro en:
Applied Physics Letters. Melville: Amer Inst Physics, v. 100, n. 1, p. 3, 2012.
0003-6951
10.1063/1.3673561
WOS:000298966200060
WOS000298966200060.pdf
0000-0003-0162-8273
Autor
Yan, Liang
Shao, Ming
Graeff, Carlos Frederico de Oliveira
Hummelgen, Ivo
Ma, Dongge
Hu, Bin
Resumen
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] Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)