Journal
SCIENCE
Volume 337, Issue 6091, Pages 204-209Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1223444
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Funding
- NSF [DMR-1104495]
- MRSEC program at the UoU [DMR-1121252]
- Israel Science Foundation [ISF 472/11]
- Israel-USA BSF [2010135]
- U.S. Department of Energy [DE-FG02-04ER46109]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1104495] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-04ER46109] Funding Source: U.S. Department of Energy (DOE)
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The spin-polarized organic light-emitting diode (spin-OLED) has been a long-sought device within the field of organic spintronics. We designed, fabricated, and studied a spin-OLED with ferromagnetic electrodes that acts as a bipolar organic spin valve (OSV), based on a deuterated derivative of poly(phenylene-vinylene) with small hyperfine interaction. In the double-injection limit, the device shows similar to 1% spin valve magneto-electroluminescence (MEL) response, which follows the ferromagnetic electrode coercive fields and originates from the bipolar spin-polarized space charge-limited current. In stark contrast to the response properties of homopolar OSV devices, the MEL response in the double-injection device is practically independent of bias voltage, and its temperature dependence follows that of the ferromagnetic electrode magnetization. Our findings provide a pathway for organic displays controlled by external magnetic fields.
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