A Study on Spin Injection of Ferromagnetic Electrode for OLED Application

Abstract:

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.

• Periodical: Advances in Science and Technology (Volume 52)
• Pages: 98-103
• DOI: https://doi.org/10.4028/www.scientific.net/AST.52.98
• Online since: October 2006
• Authors: Sung Jin Kim, Hyeon Jun Lee, Sung Kyu Kim, Chae Ryong Cho, Se Young Jeong
• Keywords: Magnetoimpedance, OLED, Spin Injection

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