News Column

Patent Issued for Perylene-Imide Semiconductor Polymers

August 20, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- Polyera Corporation (Skokie, IL) has been issued patent number 8796672, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Facchetti, Antonio (Chicago, IL); Yan, He (Skokie, IL); Chen, Zhihua (Skokie, IL); Kastler, Marcel (Basel, CH); Doetz, Florian (Singapore, SG).

This patent was filed on February 5, 2009 and was published online on August 5, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "A new generation of optoelectronic devices such as organic thin film transistors (OTFTs), organic light emitting devices (OLEDs), printable circuits, organic photovoltaic devices, capacitors and sensors are built upon organic semiconductors as their active components. To achieve high speed performance and efficient operation, it is desirable that both the p-type and n-type semiconductor materials in these organic semiconductor-based devices exhibit high charge carrier mobility (.mu.) and stability under ambient conditions, and can be processed in a cost-effective manner.

"Several p- and n-channel molecular semiconductors have achieved acceptable device performance and stability. For example, OTFTs based on certain acenes, oligothiophenes (p-channel) and perylenes (n-channel) can exhibit carrier mobilities (.mu.'s) greater than about 0.5 cm.sup.2/Vs under ambient conditions. However, molecular semiconductors tend to have less desirable solution film processing properties than polymeric semiconductors. In addition, while high-performance p-channel polymers with .mu.'s greater than about 0.1 cm.sup.2/Vs have been reported, n-channel polymers for OTFTs to date either suffer from poor processability and/or negligible electron mobilities under ambient conditions.

"Accordingly, the art desires new polymeric semiconductors, particularly n-type polymeric semiconductors, that have good stability, processing properties, and/or charge transport characteristics under ambient conditions."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "In light of the foregoing, the present teachings provide perylene-based semiconducting polymers that can address various deficiencies and shortcomings of the prior art, including those outlined above. Also provided are associated devices and related methods for the preparation and use of these polymers. The present polymers can exhibit properties such as excellent charge transport characteristics under ambient conditions, chemical stability, low-temperature processability, large solubility in common solvents, and processing versatility (e.g., printability). As a result, field effect devices such as thin film transistors that incorporate one or more of the present polymers as the semiconductor layer can have high performance under ambient conditions, for example, demonstrating one or more of large electron mobilities, low threshold voltages, and high current on-off ratios. Similarly, other organic semiconductor-based devices such as OPVs, OLETs, and OLEDs can be fabricated efficiently using the polymeric materials described herein.

"More specifically, the present polymers can include, but are not limited to, the polymers represented by the following formulae:

"##STR00001## wherein .pi.-1, .pi.-1', Ar, R.sup.1, R.sup.2, R.sup.5, U, m, and n are as defined herein.

"The present teachings also provide methods of preparing such polymers and semiconductor materials, as well as various compositions, composites, and devices that incorporate the polymers and semiconductor materials disclosed herein.

"The foregoing as well as other features and advantages of the present teachings will be more fully understood from the following figures, description, examples, and claims."

For the URL and additional information on this patent, see: Facchetti, Antonio; Yan, He; Chen, Zhihua; Kastler, Marcel; Doetz, Florian. Perylene-Imide Semiconductor Polymers. U.S. Patent Number 8796672, filed February 5, 2009, and published online on August 5, 2014. Patent URL:

Keywords for this news article include: Electronics, Semiconductor, Polyera Corporation.

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Source: Electronics Newsweekly

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