Researchers Submit Patent Application, "Charge Transport Materials for Luminescent Applications", for Approval

By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors WU, Weishi (Landenberg, PA), filed on July 12, 2012, was cleared for further review on November 8, 2012.

The patent's assignee for patent serial number 547899 is E I Du Pont De Nemours And Company.

News editors obtained the following quote from the background information supplied by the inventors: "This disclosure relates in general to materials that can be used as hosts for light-emitting materials in luminescent applications. The disclosure further relates to electronic devices having at least one active layer comprising such a host material.

"In organic photoactive electronic devices, such as organic light emitting diodes ('OLED'), that make up OLED displays, the organic active layer is sandwiched between two electrical contact layers in an OLED display. In an OLED, the organic photoactive layer emits light through the light-transmitting electrical contact layer upon application of a voltage across the electrical contact layers.

"It is well known to use organic electroluminescent compounds as the active component in light-emitting diodes. Simple organic molecules, conjugated polymers, and organometallic complexes have been used. Devices that use photoactive materials frequently include one or more charge transport layers, which are positioned between a photoactive (e.g., light-emitting) layer and a contact layer (hole-injecting contact layer). A device can contain two or more contact layers. A hole transport layer can be positioned between the photoactive layer and the hole-injecting contact layer. The hole-injecting contact layer may also be called the anode. An electron transport layer can be positioned between the photoactive layer and the electron-injecting contact layer. The electron-injecting contact layer may also be called the cathode. Charge transport materials can also be used as hosts in combination with the photoactive materials.

"There is a continuing need for charge transport materials for use in electronic devices."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent: "There is provided a compound having the formula T-LG-T, where T is a charge transport moiety having the formula --Ar.sup.1-An-Ar.sup.2 and LG is a linking group,

"wherein: An is a divalent anthracene moiety; Ar1 is a single bond or an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene; Ar2 is an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene; and LG is selected from the group consisting of biphenylene, binaphthylene, and Formula I

"##STR00002## wherein Q1 and Q2 are the same or different and are selected from the group consisting of alkyl and aryl, or Q1 and Q2 taken together are alkylene, and Ar3 and Ar4 are the same or different and are selected from the group consisting of phenylene and naphthylene.

"There is also provided an electronic device comprising at least one layer comprising the above compound.

"The foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as defined in the appended claims."

For additional information on this patent application, see: WU, Weishi. Charge Transport Materials for Luminescent Applications. U.S. Patent Serial Number 547899, filed July 12, 2012, and posted November 8, 2012. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1465&p=30&f=G&l=50&d=PG01&S1=20121101.PD.&OS=PD/20121101&RS=PD/20121101

Keywords for this news article include: E I Du Pont De Nemours And Company.

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