Effects of ferromagnetic nanowires on singlet and triplet exciton fractions in fluorescent and phosphorescent organic semiconductors

Bin Hu; Yue Wu; Zongtao Zhang; Sheng Dai; Jian Shen

doi:10.1063/1.2162801

Effects of ferromagnetic nanowires on singlet and triplet exciton fractions in fluorescent and phosphorescent organic semiconductors

Bin Hu, Yue Wu, Zongtao Zhang, Sheng Dai, Jian Shen

Chemical Sciences Division

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41 Scopus citations

Abstract

We report a magnetic field-dependent electroluminescence (EL) induced by ferromagnetic Co53 Pt47 nanowires in fluorescent conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylenevinylene] and phosphorescent iridium-complex Ir (ppy)3 molecules. The photoluminescence and EL studies indicate that the dispersed CoPt nanowires increase the singlet-to-triplet exciton ratio in organic semiconductors, suggesting that the spin-polarized holes were injected into the organic molecules from the CoPt nanowires under electrical excitation. Therefore, the use of ferromagnetic nanomaterials demonstrates a pathway to tune the optoelectronic properties that are related to singlet and triplet states in organic semiconducting materials.

Original language	English
Article number	022114
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	88
Issue number	2
DOIs	https://doi.org/10.1063/1.2162801
State	Published - 2006

Funding

This work was supported by the National Science Foundation (ECS-0521473), Tennessee Advanced Materials Laboratory, and the University of Tennessee.

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title = "Effects of ferromagnetic nanowires on singlet and triplet exciton fractions in fluorescent and phosphorescent organic semiconductors",

abstract = "We report a magnetic field-dependent electroluminescence (EL) induced by ferromagnetic Co53 Pt47 nanowires in fluorescent conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylenevinylene] and phosphorescent iridium-complex Ir (ppy)3 molecules. The photoluminescence and EL studies indicate that the dispersed CoPt nanowires increase the singlet-to-triplet exciton ratio in organic semiconductors, suggesting that the spin-polarized holes were injected into the organic molecules from the CoPt nanowires under electrical excitation. Therefore, the use of ferromagnetic nanomaterials demonstrates a pathway to tune the optoelectronic properties that are related to singlet and triplet states in organic semiconducting materials.",

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AU - Hu, Bin

AU - Wu, Yue

AU - Zhang, Zongtao

AU - Dai, Sheng

AU - Shen, Jian

PY - 2006

Y1 - 2006

N2 - We report a magnetic field-dependent electroluminescence (EL) induced by ferromagnetic Co53 Pt47 nanowires in fluorescent conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylenevinylene] and phosphorescent iridium-complex Ir (ppy)3 molecules. The photoluminescence and EL studies indicate that the dispersed CoPt nanowires increase the singlet-to-triplet exciton ratio in organic semiconductors, suggesting that the spin-polarized holes were injected into the organic molecules from the CoPt nanowires under electrical excitation. Therefore, the use of ferromagnetic nanomaterials demonstrates a pathway to tune the optoelectronic properties that are related to singlet and triplet states in organic semiconducting materials.

AB - We report a magnetic field-dependent electroluminescence (EL) induced by ferromagnetic Co53 Pt47 nanowires in fluorescent conjugated polymer poly[2-methoxy-5- (2′ -ethylhexyloxy)-1,4-phenylenevinylene] and phosphorescent iridium-complex Ir (ppy)3 molecules. The photoluminescence and EL studies indicate that the dispersed CoPt nanowires increase the singlet-to-triplet exciton ratio in organic semiconductors, suggesting that the spin-polarized holes were injected into the organic molecules from the CoPt nanowires under electrical excitation. Therefore, the use of ferromagnetic nanomaterials demonstrates a pathway to tune the optoelectronic properties that are related to singlet and triplet states in organic semiconducting materials.

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Effects of ferromagnetic nanowires on singlet and triplet exciton fractions in fluorescent and phosphorescent organic semiconductors

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