Polyn-vinylcarbazol And Derivative (epo) Patents (Class 257/E51.035)
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Publication number: 20120074390Abstract: An object is to provide a light-emitting element with high emission efficiency which includes a novel carbazole derivative that has a wide energy gap and can be used for a transport layer or a host material in a light-emitting element. A carbazole derivative in which the 4-position of dibenzothiophene or dibenzofuran is bonded to the 2- or 3-position of carbazole has been able to be provided by use of the carbazole derivative. Further, a light-emitting element having high emission efficiency has been able to be provided by use of the carbazole derivative.Type: ApplicationFiled: September 9, 2011Publication date: March 29, 2012Inventors: Satoshi Seo, Harue Osaka, Sachiko Kawakami, Nobuharu Ohsawa, Tsunenori Suzuki, Hiromi Nowatari, Hiroki Suzuki, Kyoko Takeda
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Patent number: 7816669Abstract: A light emitting system includes a polymer mixture, and a plurality of nanocrystals occupying a predetermined portion of the polymer mixture. The polymer mixture includes at least two polymers that phase-segregate. Method(s) for controlling nanocrystal distribution within the light emitting device are also disclosed.Type: GrantFiled: October 13, 2006Date of Patent: October 19, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventor: Krzysztof Nauka
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Patent number: 7800102Abstract: The organic TFT includes: a gate electrode; source and drain electrodes insulated from the gate electrode; an organic semiconductor layer insulated from the gate electrode and electrically connected to the source and drain electrodes; an insulating layer insulating the gate electrode from the source and drain electrodes and the organic semiconductor layer; and a self-assembly monolayer (SAM) included between the insulating layer and the organic semiconductor layer. A compound forming the SAM has at least one terminal group selected from the group consisting of an unsubstituted or substituted C6-C30 aryl group and an unsubstituted or substituted C2-C30 heteroaryl group. The organic TFT is formed by forming the above-described layers and forming the SAM on the insulating layer before the organic semiconductor layer and source and drain electrodes are formed.Type: GrantFiled: October 18, 2006Date of Patent: September 21, 2010Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jin-Seong Park, Taek Ahn, Min-Chul Suh
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Publication number: 20100025662Abstract: The present invention relates to a method of preparing a carbon nanotube-quantum dot conjugate having a high density of quantum dots (QDs) on its surface. This method involves providing a plurality of semiconductor quantum dots and providing a thiol-functionalized carbon nanotube having a plurality of terminal thiol groups on its surface. The plurality of semiconductor quantum dots are attached to the surface of the carbon nanotube under conditions effective to yield a carbon nanotube-quantum dot conjugate having a high density of quantum dots on its surface. The present invention also relates to a carbon nanotube-quantum dot conjugate having a high density of quantum dots on its surface. The present invention further relates to a photodetector device. This device includes a substrate and a nanocomposite layer. The nanocomposite layer includes a plurality of the carbon nanotube-quantum dot conjugates previously described.Type: ApplicationFiled: February 12, 2007Publication date: February 4, 2010Applicant: The Research Foundation of State University of New YorkInventors: Namchul CHO, Kaushik Roy CHOUDHURY, Yudhisthira SAHOO, Kwang Sup LEE, Paras N. PRASAD
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Patent number: 7582363Abstract: The present invention provides an organic polymer light-emitting element material having a gold complex structure as a part of the side chain or crosslinking group as represented by formulae (5) and (8) and an organic polymer light-emitting element comprising layer(s) comprising the organic polymer light-emitting element material. The present invention provides a polymer-based phosphorescent material useful for a multicolor or white light-emitting organic EL device having high luminous efficiency and capable of large-area formation and mass production.Type: GrantFiled: April 28, 2004Date of Patent: September 1, 2009Assignee: Showa Denko K.K.Inventors: Yoshiaki Takahashi, Isamu Taguchi, Koro Shirane
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Patent number: 7569287Abstract: A blue electroluminescent polymer having a phenoxazine-based unit in a polyarylene backbone and an organic electroluminescent device using the polymer. The organic electroluminescent device has improved luminous efficiency and color purity.Type: GrantFiled: January 23, 2006Date of Patent: August 4, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jhun-Mo Son, Tae-Yong Noh, Sang-Hoon Park, Joon-Yong Park, Tae-Woo Lee, Yu-Jin Kim, In-Nam Kang
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Publication number: 20090008633Abstract: A nonvolatile memory device and a method of manufacturing the same are provided. The nonvolatile memory device which is convertible among a high current state, an intermediate current state, and a low current state, said device includes upper and lower conductive layers; a conductive organic layer comprising a conductive organic polymer and which is formed between the upper and lower conductive layers and has a bistable conduction property; and nanocrystals are formed in the conductive organic layer. The conductive organic polymer may be poly-N-vinylcarbazole (PVK) or polystyrene (PS). The method is characterized in that a conductive organic layer is formed by applying a conductive organic material such as PVK or PS using spin coating. Therefore, it is possible to provide a highly-integrated memory device that consumes less power and provides high operating speed. In addition, it is possible to provide the thermal stability of a memory device by using a conductive organic polymer.Type: ApplicationFiled: April 24, 2008Publication date: January 8, 2009Inventors: Jea-Gun Park, Ungyu Paik, Hyun-Min Seung, Sangkyu Lee, Byeong-Il Han
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Publication number: 20080305574Abstract: The method of manufacturing a nonvolatile memory device includes forming a lower conductive layer on a substrate; forming a first conductive organic layer on the substrate using spin coating; forming a metal layer for forming nanocrystals on the first conductive organic layer, the metal layer partially overlapping the first conductive organic layer; forming a second conductive organic layer on the first conductive organic layer using spin coating; transforming the metal layer into nanocrystals by curing; and forming an upper conductive layer on the second conductive organic layer, the upper conductive layer partially overlapping the nanocrystals. The conductive organic polymer may be poly-N-vinylcarbazole (PVK) or polystyrene (PS).Type: ApplicationFiled: April 24, 2008Publication date: December 11, 2008Inventors: Jea-Gun Park, Gon-Sub Lee, Byeong-Il Han, Jong-Dae Lee
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Patent number: 7456424Abstract: A thin film transistor composed of a semiconductor layer including an optionally substituted indolocarbazole.Type: GrantFiled: June 27, 2005Date of Patent: November 25, 2008Assignee: Xerox CorporationInventors: Yiliang Wu, Beng S. Ong, Yu Qi, Yuning Li
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Patent number: 7449724Abstract: A light-emitting device is disclosed as typified by a laser oscillator formed by an electroluminescent material with improved oscillation efficiency of laser light and even reduced power consumption. The disclosed light-emitting device comprises a light-emitting element including a first electrode having a concave portion, an electroluminescent layer serving as a laser medium formed over the first electrode so as to be overlapped with the concave portion, and a second electrode formed over the electroluminescent layer so as to be overlapped with the concave portion, wherein light generated in the electroluminescent layer is resonated between the first electrode and the second electrode and emitted as laser light from the second electrode, an optical axis of the laser light intersects with the second electrode, the first electrode has a curved surface at the concave portion, and a center of curvature of the curved surface is located at the side of the second electrode above the first electrode.Type: GrantFiled: September 8, 2004Date of Patent: November 11, 2008Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Ryoji Nomura, Akihisa Shimomura
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Publication number: 20070248840Abstract: The present invention relates to an organic electroluminescent device with a light-emitting layer, the light-emitting layer comprising a photo-crosslinkable conductive polymeric host material suitable for facilitating full-color display by spin coating; and at least one small-molecule light-emitting material to achieve high power efficiency. The color-purity of device of the present invention is independent of the distribution of molecular weight of the polymer in the light-emitting layer.Type: ApplicationFiled: April 18, 2007Publication date: October 25, 2007Applicant: WINTEK CORPORATIONInventors: Sherry LIN, Gwo Sen LIN, Chi Min CHEN, Wei Shan MA
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Publication number: 20070215865Abstract: Described herein is an organic opto-electronic device comprising a cathode comprising at least one zero-valent metal; an anode; an opto-electronically active organic material; wherein said cathode is in contact with at least one organic phosphonium salt. In certain embodiments, the organic phosphonium salt has structure (I) wherein R1-R4 are independently at each occurrence a C1-C20 aliphatic radical, a C3-C20 cycloaliphatic radical, or a C3-C20 aromatic radical is disclosed and wherein X? is selected from the group consisting of monovalent inorganic anions, monovalent organic anions, polyvalent inorganic anions, polyvalent organic anions, and mixtures thereof.Type: ApplicationFiled: March 20, 2006Publication date: September 20, 2007Applicant: General Electric CompanyInventors: Jie Liu, James Cella, Larry Lewis, Anil Duggal, James Spivack, Qing Ye
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Patent number: 7223483Abstract: The invention relates to a light-emitting material having high emitting efficiency, high luminance and durability for use in an organic light-emitting device and to an organic electroluminescent (EL) device, in which the light-emitting material is used. The light-emitting material contains a light-emitting substance which is spatially constricted and confined in an order of two dimensions or more, thus providing a high efficient organic light-emitting device based on emission of phosphorescence from an excited triplet state.Type: GrantFiled: February 20, 2002Date of Patent: May 29, 2007Assignee: Showa Denko K.K.Inventors: Koro Shirane, Motoaki Kamachi, Naoko Ito, Tamami Koyama
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Publication number: 20060257686Abstract: In functional inks for relief printing concerning the present invention, contents of compositions of functional layers can be 1.0-2.5 wt %. In addition, viscosity of functional ink for relief printing can be 15-50 mPa·s. Therefore, each functional layer can be formed with uniformity and reasonable thickness.Type: ApplicationFiled: May 10, 2006Publication date: November 16, 2006Inventors: Takahisa Shimizu, Koji Takeshita, Hironori Kawakami