Room-temperature spin-polarized organic light-emitting diodes with a single ferromagnetic electrode

In this paper, we demonstrate the concept of a room-temperature spin-polarized organic light-emitting diode (Spin-OLED) structure based on (i) the deposition of an ultra-thin p-type organic buffer layer on the surface of the ferromagnetic electrode of the Spin-OLED and (ii) the use of oxygen plasma...

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Bibliographic Details
Published in:Applied physics letters 2014-05, Vol.104 (20)
Main Authors: Ding, Baofu, Song, Qunliang, Alameh, Kamal
Format: Article
Language:English
Subjects:
Applied physics
BRIGHTNESS
Buffer layers
BUFFERS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DEPOSITION
Diodes
ELECTRODES
ELECTROLUMINESCENCE
Ferromagnetism
INJECTION
LAYERS
LIGHT EMITTING DIODES
MAGNETIC FIELDS
Organic light emitting diodes
ORGANIC SEMICONDUCTORS
Oxygen plasma
Plasma
Room temperature
SPIN ORIENTATION
SURFACES
TEMPERATURE RANGE 0273-0400 K
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Summary:In this paper, we demonstrate the concept of a room-temperature spin-polarized organic light-emitting diode (Spin-OLED) structure based on (i) the deposition of an ultra-thin p-type organic buffer layer on the surface of the ferromagnetic electrode of the Spin-OLED and (ii) the use of oxygen plasma treatment to modify the surface of that electrode. Experimental results demonstrate that the brightness of the developed Spin-OLED can be increased by 110% and that a magneto-electroluminescence of 12% can be attained for a 150 mT in-plane magnetic field, at room temperature. This is attributed to enhanced hole and room-temperature spin-polarized injection from the ferromagnetic electrode, respectively.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4879461