Effects of electric field and magnetic induction on spin injection into organic semiconductors

✍ Scribed by Y.M. Wang; J.F. Ren; X.B. Yuan; Z.T. Dou; G.C. Hu

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 275 KB
• Volume: 406
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2010.12.029

✦ Synopsis

Spin-polarized injection and transport into ferromagnetic/organic semiconductor structure are studied theoretically in the presence of the external electric field and magnetic induction. Based on the spin-driftdiffusion theory and Ohm's law, we obtain the charge current polarization, which takes into account the special carriers of organic semiconductors. From the calculation, it is found that the current spin polarization is enhanced by several orders of magnitude by tuning the magnetic induction and electric fields. To get an apparent current spin polarization, the effects of spin-depended interfacial resistances and the special carriers in the organic semiconductor, which are polarons and bipolarons, are also discussed.