Room-temperature organic ferromagnetism in the crystalline poly(3-hexylthiophene): Phenyl-C61-butyric acid methyl ester blend film

Yang, Bin; Xiao, Zhengguo; Yuan, Yongbo; Jayaraman, Tanjore V.; Shield, Jeffrey E.; Skomski, Ralph; Huang, Jinsong

doi:10.1016/j.polymer.2012.12.024

Cited by 14 publications

(11 citation statements)

References 19 publications

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“…Both polymer conjugation and delocalization was affected by the electron transfer. Similar results were reported by B. Yang et al They observed that the saturation ferromagnetism of polymer P3HT mixed with phenyl-C61-butryic acid methyl ester (PCBM) was about 0.65 emu/g and suggested that the ferromagnetism origin is associated with P3HT crystallization and the charge transfer between P3HT and PCBM [29]. Accordingly, this study indicated that the magnetism of polymer composite could be further tuned by adjusting the content of each component, and also the interaction at the interface.…”

Section: Resultssupporting

confidence: 84%

Interface Interactions in Conjugated Polymer Composite with Metal Oxide Nanoparticles

Atisme

Tseng

et al. 2019

Nanomaterials

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This study presents the preparation, characterization, and properties of a new composite containing cerium oxide nanoparticles and a conjugated polymer. CeO2 nanoparticles prepared using the co-precipitation method were dispersed into the conjugated polymer, prepared using the palladium-catalyzed Suzuki–Miyaura cross-coupling reaction. The interface interactions between the two components and the resultant optoelectronic properties of the composite are demonstrated. According to transmission electron microscopy and X-ray absorption spectroscopy, the dispersion of CeO2 nanoparticles in the polymer matrix strongly depends on the CeO2 nanoparticle concentration and results in different degrees of charge transfer. The photo-induced charge transfer and recombination processes were studied using steady-state optical spectroscopy, which shows a significant fluorescence quenching and red shifting in the composite. The higher photo-activity of the composite as compared to the single components was observed and explained. Unexpected room temperature ferromagnetism was observed in both components and all composites, of which the origin was attributed to the topology and defects.

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Section: Resultssupporting

confidence: 84%

Interface Interactions in Conjugated Polymer Composite with Metal Oxide Nanoparticles

Atisme

Tseng

et al. 2019

Nanomaterials

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“…Such compounds often exhibit interesting magnetic properties, which underlie spintronic elements and quantum devices . Although single molecule magnets were found to show ferromagnetism only at low temperatures, − some organic molecular crystals (which may be chiral , ), as well as some paramagnetic and diamagnetic organic molecules assembled in supramolecular structures, , reveal ambient temperature ferromagnetism. − For example, the assembly of hexacyanoferrate(III) anions and nickel(II) bisdiamino complexes of the chiral ligand trans -cyclohexane-1,2-diamine yields cyanide-bridged two-dimensional ferromagnets. Their crystal structure is built from cyanide-bridged bimetallic planes separated by bulky ligands.…”

mentioning

confidence: 99%

Long-Range Spin-Selective Transport in Chiral Metal–Organic Crystals with Temperature-Activated Magnetization

et al. 2020

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Room-temperature, long-range (300 nm), chirality-induced spin-selective electron conduction is found in chiral metal–organic Cu(II) phenylalanine crystals, using magnetic conductive-probe atomic force microscopy. These crystals are found to be also weakly ferromagnetic and ferroelectric. Notably, the observed ferromagnetism is thermally activated, so that the crystals are antiferromagnetic at low temperatures and become ferromagnetic above ∼50 K. Electron paramagnetic resonance measurements and density functional theory calculations suggest that these unusual magnetic properties result from indirect exchange interaction of the Cu(II) ions through the chiral lattice.

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“…% P3HT sample had more pronounced P3HT absorption peaks and shoulders, distinctly indicating higher degree of crystallinity in the P3HT polymer domains. [21][22][23] In addition, the absorption peak of the 50 wt. % P3HT film was at about 496 nm, which exhibited an evident red-shift of about 25 nm compared to that of the 25 wt.…”

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confidence: 99%

Polymer aggregation correlated transition from Schottky-junction to bulk heterojunction organic solar cells

Yang

Xiao

Huang

2014

Applied Physics Letters

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The fullerene-based organic Schottky-junction solar cells have recently attracted intensive research interest because of their unique electrical performance, such as significant photocurrent generation from excitons created in fullerenes and large open-circuit voltage (V OC ) output induced by high Schottky-barrier height between the anode and the fullerene acceptor. This manuscript reports another remarkably appealing advantage that the fullerene-based Schottky-junction solar cells are more stable than the bulk heterojunction counterparts. The better stability is likely due to mitigative polymer photo-oxidation and/or little morphological change of active film in the aged Schottky-junction devices. The transition from Schottky-junction to bulk heterojunction appears at polymer donor loading ratio of 20-25 wt. % by examining the variation in the V OC with increased loading ratio of the poly(3-hexylthiophene) donor. Multiple experimental evidences, including the absorbance spectrum measurement, photoluminescence study, active film morphology characterization, and charge mobility measurement, conclusively reveal that the transition from Schottky-junction to bulk heterojunction is correlated to the polymer donor aggregation in the active films. V C 2014 AIP Publishing LLC. [http://dx.

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Room-temperature organic ferromagnetism in the crystalline poly(3-hexylthiophene): Phenyl-C61-butyric acid methyl ester blend film

Abstract: "Roomtemperature organic ferromagnetism in the crystalline poly(3-hexylthiophene): Phenyl-C61-butyric acid methyl ester blend film"

Cited by 14 publications

References 19 publications

Interface Interactions in Conjugated Polymer Composite with Metal Oxide Nanoparticles

Interface Interactions in Conjugated Polymer Composite with Metal Oxide Nanoparticles

Long-Range Spin-Selective Transport in Chiral Metal–Organic Crystals with Temperature-Activated Magnetization

Polymer aggregation correlated transition from Schottky-junction to bulk heterojunction organic solar cells

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