A Study on Spin Injection of Ferromagnetic Electrode for OLED Application
We have investigated the magnetic effect on the electrical properties of Al and Ni electrode based organic light-emitting devices (OLEDs). The Ni electrode-based OLEDs were compared to Al-based OLEDs in terms of their applied magnetic fields (0.3 T). We found that for current density-voltage on Al and Ni electrodes for OLEDs, Ni electrodes can be applied to OLEDs. The value of magneto-impedance or the resistance ratio decreased in comparison to situations with the absence of a magnetic field. The magneto-impedance or resistance effect indicated that the spin polarization was preserved through the organic layer. We found that the frequency response of magneto-impedance decreased the external magnetic field at room temperature. Electrical characterizations of the OLEDs with spin-polarized electrodes indicated the applicability of the ferromagnetic electrodes to organic light-emitting devices.
P. VINCENZINI and D. FIORANI
S. J. Kim et al., "A Study on Spin Injection of Ferromagnetic Electrode for OLED Application", Advances in Science and Technology, Vol. 52, pp. 98-103, 2006