Oriented Luminescent Nanostructures From Single Molecules Of Conjugated Polymers

AbstractDipole emission pattern imaging experiments on single chains of common conjugated polymers (solubilized poly phenylene vinylenes) isolated by ink-jet printing techniques have revealed surprising uniformity in transition moment orientation perpendicular to the support substrate. In addition to uniform orientation, these species show a number of striking differences in photochemical stability, polarization anisotropy,[1] and spectral signatures[2] with respect to similar (well-studied) molecules dispersed in dilute thin-films. Combined with molecular mechanics simulation, these results point to a structural picture of a folded macromolecule as a highly ordered cylindrical nanostructure whose long-axis (approximately collinear with the conjugation axis) is oriented, by an electrostatic interaction, perpendicular to the coverglass substrate. These results suggest a number of important applications in nanoscale photonics and molecular-scale optoelectronics.

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Color Ink-Jet Printing Techniques

10.1117/12.952799 ◽

1989 ◽

Author(s):

Doug Watson

Keyword(s):

Ink Jet Printing ◽

Ink Jet ◽

Jet Printing ◽

Printing Techniques

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High-Resolution Ink-Jet Printing of All-Polymer Transistor Circuits

MRS Bulletin ◽

10.1557/mrs2001.127 ◽

2001 ◽

Vol 26 (7) ◽

pp. 539-543 ◽

Cited By ~ 66

Author(s):

H. Sirringhaus ◽

T. Kawase ◽

R.H. Friend

Keyword(s):

High Resolution ◽

Visual Information ◽

Synthetic Polymers ◽

Vacuum Deposition ◽

Ordered Structures ◽

Direct Printing ◽

Vapor Phase Deposition ◽

Ink Jet ◽

Jet Printing ◽

Printing Techniques

Impressive advances in vapor-phase deposition and photolithographic patterning techniques have been fueling the silicon microelectronics revolution over the last 40 years. However, for many interesting classes of materials, including biological materials or functional synthetic polymers, vacuum deposition and photolithography are not the techniques of choice for producing ordered structures and devices. Many of these materials selfassemble into well-ordered microstructures when deposited from solution, and patterning may be more readily achieved by solution-based selective deposition and direct-printing techniques. It is appealing to consider novel ways of manufacturing functional circuits and devices based on techniques that are similar to printing visual information onto paper.

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Deposition of Molten Eutectic Solder using Jet Printing Techniques

MRS Proceedings ◽

10.1557/proc-390-201 ◽

1995 ◽

Vol 390 ◽

Cited By ~ 2

Author(s):

Michael D. Snyder ◽

Ronald Lasky

Keyword(s):

Surface Tension ◽

Circuit Boards ◽

Eutectic Solder ◽

On Demand ◽

Drop On Demand ◽

Single Feature ◽

Ink Jet ◽

Jet Printing ◽

Printing Techniques ◽

Large Spherical

ABSTRACTThis paper discusses the use of Ink Jet printing techniques to dispense small (50 to 75 micrometer diameter) particles of molten eutectic solder individually at programmable dispense rates from drop on demand to several thousand per second. Alternative jet dispensing techniques are discussed. The technology could allow the selective application of programmable amounts of solder on precision circuit boards and wafer substrates, while avoiding the high cost and flexibility limits associated with hard tooling. Large solder features can be constructed by dispensing individual droplets and relying on surface tension to draw them together to form a large single feature. Alternatively, columnar features can be created by successively dispensing solder droplets at the same site, allowing time between successive droplets to avoid forming a single large spherical feature.Several potential application areas in industry are discussed along with some of the issues associated with the projected performance of the method in the accuracy and speed domains.

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Nanostructured p–n Junctions for Printable Photovoltaics

MRS Bulletin ◽

10.1557/mrs2004.16 ◽

2004 ◽

Vol 29 (1) ◽

pp. 43-47 ◽

Cited By ~ 8

Author(s):

Christoph J. Brabec ◽

Thomas Nann ◽

Sean E. Shaheen

Keyword(s):

Conjugated Polymers ◽

Organic Molecules ◽

Bulk Heterojunction ◽

Inorganic Nanoparticles ◽

Electrical And Optical Properties ◽

Inorganic Semiconductors ◽

Molecular Scale ◽

Type Semiconductor ◽

The Individual ◽

Printing Techniques

AbstractBy controlling the morphology of organic and inorganic semiconductors on a molecular scale, nanoscale p–n junctions can be generated in a bulk composite. Such a composite is typically called a bulk heterojunction composite, which can be considered as one virtual semiconductor combining the electrical and optical properties of the individual components. Solar cells are one attractive application for bulk heterojunction composites. Conjugated polymers or oligomers are the favorite p-type semiconducting class for these composites, while for the n-type semiconductor, inorganic nanoparticles as well as organic molecules have been investigated. Due to the solubility of the individual components, printing techniques are used to fabricate them.

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Simple Modification of Sheet Resistivity of Conducting Polymeric Anodes via Combinatorial Ink-Jet Printing Techniques

Macromolecular Rapid Communications ◽

10.1002/marc.200400527 ◽

2005 ◽

Vol 26 (4) ◽

pp. 238-246 ◽

Cited By ~ 95

Author(s):

Yuka Yoshioka ◽

Paul D. Calvert ◽

Ghassan E. Jabbour

Keyword(s):

Sheet Resistivity ◽

Simple Modification ◽

Ink Jet Printing ◽

Ink Jet ◽

Jet Printing ◽

Printing Techniques

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Photochemical Patterning Approaches for Multicolor Polymer Light Emitting Devices

MRS Proceedings ◽

10.1557/proc-771-l9.9 ◽

2003 ◽

Vol 771 ◽

Cited By ~ 1

Author(s):

A. Pogantsch ◽

G. Trattnig ◽

S. Rentenberger ◽

G. Langer ◽

J. Keplinger ◽

...

Keyword(s):

Conjugated Polymers ◽

Active Agent ◽

Direct Writing ◽

Light Emitting ◽

Light Emitting Devices ◽

Current Topic ◽

Ink Jet ◽

Jet Printing ◽

Polymer Light Emitting Devices ◽

Device Technology

AbstractThe patterning of conjugated polymers for multicolored electroluminescence applications is a current topic of research in polymer device technology. Several techniques including direct writing approaches such as ink-jet printing have been proposed to solve this challenge. We present an approach to tuning the (electro)luminescence color of a film consisting of a blend of conjugated polymers after its deposition by means of UV-irradiation in the presence of an active agent. This promises to be an alternative, highly parallel approach towards multicolored electroluminescence.

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