Spin injection into organic light-emitting diodes with a ferromagnetic cathode and observation of the luminescence properties

Eiji Shikoh; Toru Kawai; Akihiko Fujiwara; Yasuo Ando; Terunobu Miyazaki

doi:10.1016/j.jmmm.2006.10.981

Spin injection into organic light-emitting diodes with a ferromagnetic cathode and observation of the luminescence properties

Eiji Shikoh, Toru Kawai, Akihiko Fujiwara, Yasuo Ando, Terunobu Miyazaki

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Electroluminescence (EL) properties of organic light-emitting diodes (LEDs) under an external magnetic field were investigated for observation of spin-polarized luminescence. When an external magnetic field was applied to organic LEDs with an Fe cathode, circularly polarized light was observed, while devices with an Al cathode did not show such behavior. In order to confirm whether the circularly polarized light was certainly due to spin injection or not, photoluminescence (PL) property of Alq₃ (tris-(8-hydroxyquinolinato)-aluminum) film on Fe and that of Alq₃ film on Al under an external magnetic field were investigated. In the case of Alq₃ on Fe film, the degree of circular polarization from EL was much higher than that from PL. This suggested that circular polarization on EL was mainly due to spin injection.

Original language	English
Pages (from-to)	2052-2054
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 3
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.981
Publication status	Published - 2007 Mar

Keywords

Electroluminescence
Magneto-optical effect
Organic light-emitting diode
Photoluminescence
Spin injection

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10.1016/j.jmmm.2006.10.981

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title = "Spin injection into organic light-emitting diodes with a ferromagnetic cathode and observation of the luminescence properties",

abstract = "Electroluminescence (EL) properties of organic light-emitting diodes (LEDs) under an external magnetic field were investigated for observation of spin-polarized luminescence. When an external magnetic field was applied to organic LEDs with an Fe cathode, circularly polarized light was observed, while devices with an Al cathode did not show such behavior. In order to confirm whether the circularly polarized light was certainly due to spin injection or not, photoluminescence (PL) property of Alq3 (tris-(8-hydroxyquinolinato)-aluminum) film on Fe and that of Alq3 film on Al under an external magnetic field were investigated. In the case of Alq3 on Fe film, the degree of circular polarization from EL was much higher than that from PL. This suggested that circular polarization on EL was mainly due to spin injection.",

keywords = "Electroluminescence, Magneto-optical effect, Organic light-emitting diode, Photoluminescence, Spin injection",

author = "Eiji Shikoh and Toru Kawai and Akihiko Fujiwara and Yasuo Ando and Terunobu Miyazaki",

note = "Funding Information: This research was supported by Grant for Basic Science Project from Sumitomo Foundation, Grant-in-Aid for Scientific Research (Encouragement for Young Scientists (B) No. 17760009) from the Ministry of Education, Science Sports and Culture, and NEDO-Grant (2004IT093) from NEDO.",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.981",

language = "English",

volume = "310",

pages = "2052--2054",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Spin injection into organic light-emitting diodes with a ferromagnetic cathode and observation of the luminescence properties

AU - Shikoh, Eiji

AU - Kawai, Toru

AU - Fujiwara, Akihiko

AU - Ando, Yasuo

AU - Miyazaki, Terunobu

N1 - Funding Information: This research was supported by Grant for Basic Science Project from Sumitomo Foundation, Grant-in-Aid for Scientific Research (Encouragement for Young Scientists (B) No. 17760009) from the Ministry of Education, Science Sports and Culture, and NEDO-Grant (2004IT093) from NEDO.

PY - 2007/3

Y1 - 2007/3

N2 - Electroluminescence (EL) properties of organic light-emitting diodes (LEDs) under an external magnetic field were investigated for observation of spin-polarized luminescence. When an external magnetic field was applied to organic LEDs with an Fe cathode, circularly polarized light was observed, while devices with an Al cathode did not show such behavior. In order to confirm whether the circularly polarized light was certainly due to spin injection or not, photoluminescence (PL) property of Alq3 (tris-(8-hydroxyquinolinato)-aluminum) film on Fe and that of Alq3 film on Al under an external magnetic field were investigated. In the case of Alq3 on Fe film, the degree of circular polarization from EL was much higher than that from PL. This suggested that circular polarization on EL was mainly due to spin injection.

AB - Electroluminescence (EL) properties of organic light-emitting diodes (LEDs) under an external magnetic field were investigated for observation of spin-polarized luminescence. When an external magnetic field was applied to organic LEDs with an Fe cathode, circularly polarized light was observed, while devices with an Al cathode did not show such behavior. In order to confirm whether the circularly polarized light was certainly due to spin injection or not, photoluminescence (PL) property of Alq3 (tris-(8-hydroxyquinolinato)-aluminum) film on Fe and that of Alq3 film on Al under an external magnetic field were investigated. In the case of Alq3 on Fe film, the degree of circular polarization from EL was much higher than that from PL. This suggested that circular polarization on EL was mainly due to spin injection.

KW - Electroluminescence

KW - Magneto-optical effect

KW - Organic light-emitting diode

KW - Photoluminescence

KW - Spin injection

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SUPPL. PART 3

ER -

Spin injection into organic light-emitting diodes with a ferromagnetic cathode and observation of the luminescence properties

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Keywords

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