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Researchers Submit Patent Application, "Organic Light-Emitting Diode Comprising Amine-Based Compounds and Pyrene-Based Compounds", for Approval

August 6, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Kim, Se-Hun (Yongin-City, KR); Cho, Hwan-Hee (Yongin-City, KR); Kim, Myoung-Ki (Yongin-City, KR); Kim, Mi-Kyung (Yongin-City, KR); Chu, Chang-Woong (Yongin-City, KR); Hong, Jong-In (Seoul, KR), filed on July 11, 2013, was made available online on July 24, 2014.

No assignee for this patent application has been made.

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to organic light-emitting diodes comprising amine-based compounds and pyrene-based compounds.

"Organic light-emitting devices (OLEDs) are self-emitting devices that have advantages such as wide viewing angles, good contrast, quick response speeds, high brightness, and good driving voltage characteristics. Also, OLEDs can provide multicolored images.

"A typical OLED has a structure including a substrate, and an anode, a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), and a cathode sequentially stacked on the substrate. In this regard, the HTL, the EML, and the ETL are organic thin films formed of organic compounds.

"An operating principle of an OLED having the above-described structure is as follows:

"When a voltage is applied between the anode and the cathode, holes injected from the anode move to the EML via the HTL, and electrons injected from the cathode move to the EML via the ETL. The holes and electrons recombine in the EML to generate excitons. When the excitons drop from an excited state to a ground state, light is emitted."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "Embodiments of the present invention are directed to a high definition organic light-emitting diode

"According to another aspect of the present invention, an organic light-emitting device includes: a first electrode; a second electrode, and an organic layer between the first electrode and the second electrode and including an emission layer. The organic layer includes at least one amine-based compound represented by Formula 1 below and at least one pyrene-based compound represented by Formula 2 below.

"##STR00001##

"In Formula 1 and 2, X.sub.1 to X.sub.4 are each independently a substituted or unsubstituted C.sub.3-C.sub.10 cycloalkylene group, a substituted or unsubstituted C.sub.2-C.sub.10 heterocycloalkylene group, a substituted or unsubstituted C.sub.3-C.sub.10 cycloalkenylene group, a substituted or unsubstituted C.sub.2-C.sub.10 cycloalkenylene group, a substituted or unsubstituted C.sub.6-C.sub.60 arylene group, or a substituted or unsubstituted C.sub.2-C.sub.60 heteroarylene group.

"n1 to n4 are each independently an integer of 0 to 5. If n1 is an integer of 2 or more, then the 2 or more X.sub.1 groups are the same or different, if n2 is an integer of 2 or more, then the 2 or more X.sub.2 groups are the same or different, if n3 is an integer of 2 or more, then the 2 or more X.sub.3 groups are the same or different, and if n4 is an integer of 2 or more, then the 2 or more X.sub.4 groups are the same or different.

"Y.sub.1 to Y.sub.4 are each independently a substituted or unsubstituted C.sub.3-C.sub.10 cycloalkylene group, a substituted or unsubstituted C.sub.2-C.sub.10 heterocycloalkyl group, a substituted or unsubstituted C.sub.3-C.sub.10 cycloalkenyl group, a substituted or unsubstituted C.sub.2-C.sub.10 cycloalkenyl group, a substituted or unsubstituted C.sub.6-C.sub.30 aryl group, or a substituted or unsubstituted C.sub.2-C.sub.30 heteroarylene group.

"Z.sub.1 and Z.sub.2 are electron transporting groups and are each independently a substituted or unsubstituted C.sub.2-C.sub.10 heterocycloalkyl group, a substituted or unsubstituted C.sub.2-C.sub.10 heterocycloalkenyl group, or a substituted or unsubstituted C.sub.2-C.sub.60 heteroaryl group.

"R.sub.1 to R.sub.4 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine, a hydrazone, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C.sub.1-C.sub.60 alkyl group, a substituted or unsubstituted C.sub.2-C.sub.60 alkenyl group, a substituted or unsubstituted C.sub.2-C.sub.60 alkynyl group, a substituted or unsubstituted C.sub.1-C.sub.60 alkoxy group, a substituted or unsubstituted C.sub.3-C.sub.10 cycloalkyl group, a substituted or unsubstituted C.sub.2-C.sub.10 heterocycloalkyl group, a substituted or unsubstituted C.sub.3-C.sub.10 cycloalkenyl group, a substituted or unsubstituted C.sub.2-C.sub.10 heterocycloalkenyl group, a substituted or unsubstituted C.sub.6-C.sub.60 aryloxy group, a substituted or unsubstituted C.sub.6-C.sub.60 arylthio group, or a substituted or unsubstituted C.sub.2-C.sub.60 heteroaryl group.

"a1 to a4 are each independently an integer of 0 to 4. If a1 is an integer of 2 or more, then the 2 or more R.sub.1 groups are the same or different, if a2 is an integer of 2 or more, then the 2 or more R.sub.2 groups are the same or different, if a3 is an integer of 2 or more, then the 2 or more R.sub.3 groups are the same or different, and if a4 is an integer of 2 or more, then the 2 or more R.sub.4 groups are the same or different.

"b1 and b2 are each independently an integer of 0 or 1.

"The organic light-emitting diode including the amine-based compound and the pyrene-based compound may have high efficiency and a long lifespan.

BRIEF DESCRIPTION OF THE DRAWINGS

"The above and other features and advantages of the present invention will become more apparent by reference to the following detailed description, when considered in conjunction with the attached drawings in which:

"FIG. 1 is a schematic view of a structure of an organic light-emitting diode according to an embodiment of the present invention."

For additional information on this patent application, see: Kim, Se-Hun; Cho, Hwan-Hee; Kim, Myoung-Ki; Kim, Mi-Kyung; Chu, Chang-Woong; Hong, Jong-In. Organic Light-Emitting Diode Comprising Amine-Based Compounds and Pyrene-Based Compounds. Filed July 11, 2013 and posted July 24, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4497&p=90&f=G&l=50&d=PG01&S1=20140717.PD.&OS=PD/20140717&RS=PD/20140717

Keywords for this news article include: Patents, Electronics, Light-emitting Diode.

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Source: Electronics Newsweekly


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