A novel approach to electrospinning of pristine and aligned MEH-PPV using binary solvents

Zhong, Wei; Fan, Li; Chen, Lie; Chen, Yiwang; Wei, Yen

doi:10.1039/c2jm15970h

Cited by 26 publications

(45 citation statements)

References 51 publications

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“…41 Moreover, increasing the nonsolvent content is expected to improve the solution conductivity as well, because of the 2 orders of magnitude higher electrical conductivity of DMSO compared to chloroform. 52 …”

Section: Resultsmentioning

confidence: 99%

Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers

et al. 2016

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Conjugated polymers are complex multichromophore systems, with emission properties strongly dependent on the electronic energy transfer through active subunits. Although the packing of the conjugated chains in the solid state is known to be a key factor to tailor the electronic energy transfer and the resulting optical properties, most of the current solution-based processing methods do not allow for effectively controlling the molecular order, thus making the full unveiling of energy transfer mechanisms very complex. Here we report on conjugated polymer fibers with tailored internal molecular order, leading to a significant enhancement of the emission quantum yield. Steady state and femtosecond time-resolved polarized spectroscopies evidence that excitation is directed toward those chromophores oriented along the fiber axis, on a typical time scale of picoseconds. These aligned and more extended chromophores, resulting from the high stretching rate and electric field applied during the fiber spinning process, lead to improved emission properties. Conjugated polymer fibers are relevant to develop optoelectronic plastic devices with enhanced and anisotropic properties.

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Section: Resultsmentioning

confidence: 99%

Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers

et al. 2016

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“…These values are significantly smaller than in other reported pristine conjugated polymer nanofibers, having typical average diameter >200 nm and larger dispersions in size (>100 nm). 20,42 In addition, Figure 1e,f shows a SEM micrograph and the corresponding diameter distribution of electrospun fibers obtained from a PFO–PBAB/TBAB chloroform solution, at optimized electrospinning conditions. The average diameter of the fibers is about 360 nm (σ = 320 nm), larger than the values obtained by using the TBAI salt.…”

Section: Resultsmentioning

confidence: 99%

“…To this aim, effective approaches to electrospin conjugated polymer fibers utilize a mixture of good and poor solvents in order to improve the solution processability. 20,42 …”

Section: Introductionmentioning

confidence: 99%

Bright Light Emission and Waveguiding in Conjugated Polymer Nanofibers Electrospun from Organic Salt Added Solutions

et al. 2013

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Light-emitting electrospun nanofibers of poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(N,N′-diphenyl)-N,N′-di(p-butyl-oxy-phenyl)-1,4-diaminobenzene)] (PFO–PBAB) are produced by electrospinning under different experimental conditions. In particular, uniform fibers with average diameter of 180 nm are obtained by adding an organic salt to the electrospinning solution. The spectroscopic investigation assesses that the presence of the organic salt does not alter the optical properties of the active material, therefore providing an alternative approach for the fabrication of highly emissive conjugated polymer nanofibers. The produced nanofibers display self-waveguiding of light, and polarized photoluminescence, which is especially promising for embedding active electrospun fibers in sensing and nanophotonic devices.

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“…These observations, in addition to the numerous markers of strong molecular orientation observed in other polymeric semiconductors [62,67,70,77,78,160–162], indicates that electrospinning can be exploited as a general method to access active phases with controlled microstructural anisotropy, in contrast with films deposited by spin-coating in which planar morphological isotropy is generally encountered.…”

Section: Semiconducting Polymer Fibersmentioning

confidence: 97%

Electrospun Polymer Fibers for Electronic Applications

et al. 2014

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Nano- and micro- fibers of conjugated polymer semiconductors are particularly interesting both for applications and for fundamental research. They allow an investigation into how electronic properties are influenced by size confinement and chain orientation within microstructures that are not readily accessible within thin films. Moreover, they open the way to many applications in organic electronics, optoelectronics and sensing. Electro-spinning, the technique subject of this review, is a simple method to effectively form and control conjugated polymer fibers. We provide the basics of the technique and its recent advancements for the formation of highly conducting and high mobility polymer fibers towards their adoption in electronic applications.

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A novel approach to electrospinning of pristine and aligned MEH-PPV using binary solvents

Cited by 26 publications

References 51 publications

Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers

Anisotropic Conjugated Polymer Chain Conformation Tailors the Energy Migration in Nanofibers

Bright Light Emission and Waveguiding in Conjugated Polymer Nanofibers Electrospun from Organic Salt Added Solutions

Electrospun Polymer Fibers for Electronic Applications

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