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Device degradation and the circular polarization of the electro-phosphorescent organic light-emitting diode with a ferromagnetic cathode

Shikoh, E ; Nakagawa, E ; Fujiwara, A

Journal of physics. Conference series, 2010-01, Vol.200 (6), p.062027 [Periódico revisado por pares]

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Título:
Device degradation and the circular polarization of the electro-phosphorescent organic light-emitting diode with a ferromagnetic cathode
Autor: Shikoh, E ; Nakagawa, E ; Fujiwara, A
Assuntos: Cathodes ; Cathodic polarization ; Circular polarization ; Degradation ; Electrode polarization ; Ferromagnetism ; Iron ; Light emitting diodes ; Organic light emitting diodes ; Phosphorescence ; Polarization (spin alignment)
É parte de: Journal of physics. Conference series, 2010-01, Vol.200 (6), p.062027
Descrição: Circular polarization of organic light-emitting diode with a ferromagnetic metal Fe cathode and with a phosphorescent molecule Ir(ppy)3 was observed. The maximum degree of circular polarization was 0.4 % at constant voltage operation and 0.6 % at constant current operation. Degree of circular polarization was independent of device degradation process. Both the maximum degrees of circular polarization were much smaller than the value expected from the spin-polarization at Fermi energy of the Fe cathode. Efficient spin-injection and spin-transport into emissive molecules are expected to improve the degree of circular polarization.
Editor: Bristol: IOP Publishing
Idioma: Inglês

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