Patents by Inventor Kung-Hwa Wei

Kung-Hwa Wei has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190330065
    Abstract: A graphite composite conductive bar material and a method for producing graphene using the same are provided. The graphite composite conductive bar material is fabricated via mixing graphite powder more than 50% by weight with a polymeric material. The graphite composite conductive bar is used in a plasma electrochemical exfoliation process as a cathode and contacts with the surface of the electrolytic solution, whereby the bar material is exfoliated to obtain a less defective graphene. Therefore, the present invention can improve product yield and reduce production cost. In addition, a solid-state nitrogen-containing precursor may be added to the graphite composite conductive bar material for producing nitrogen-doped graphene. In the nitrogen-doped graphene produced by the present invention, the amount of doped nitrogen is increased and tunable compared to the former invention, and the level of oxidization is decreased.
    Type: Application
    Filed: October 3, 2018
    Publication date: October 31, 2019
    Inventors: Kung-Hwa WEI, Po-Jen YEN
  • Patent number: 9695516
    Abstract: A graphite oxide and/or graphene preparation method includes providing a plasma electrolytic apparatus, wherein an electrolyte is provided and a graphite electrode is configured as a cathode of the plasma electrolytic apparatus; and providing a cathodic current so as to initiate a plasma electrolytic process at the graphite electrode to obtain graphite oxide and/or graphene. The graphite oxide and/or graphene can be synthesized through plasma electrolytic processing at relatively low temperature under atmospheric pressure within a very short period of time, without the need for concentrated acids or strong oxidizing agents. The present invention may prepare graphite oxide and/or graphene with plasma electrolytic process directly from graphite, without requiring any prior purification or pretreatment. This plasma electrolytic process of the present invention is quite promising and provided with advantages such as low cost, simple setup, high efficiency, and environmental friendliness.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: July 4, 2017
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Kung-Hwa Wei, Van Thanh Dang
  • Patent number: 9096938
    Abstract: A graphite oxide or graphene preparation method includes providing a plasma electrolytic apparatus, where an electrolytic solution is provided and a graphite electrode is configured as a cathode of the plasma electrolytic apparatus; and providing a cathodic current so as to initiate a plasma electrolytic process at the graphite cathode to obtain graphite oxide or graphene. The graphite oxide can be synthesized through plasma electrolytic processing at relatively low temperature under atmospheric pressure within a very short period of time, without the need for concentrated acids or strong oxidizing agents. The present invention may prepare graphite oxide with plasma electrolytic process directly from graphite, without requiring any prior purification. This plasma electrolytic process of the present invention is quite promising and provided with advantages such as low cost, simple setup, high efficiency, and environmental friendliness.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: August 4, 2015
    Assignee: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Van Thanh Dang
  • Publication number: 20150060297
    Abstract: A graphite oxide and/or graphene preparation method includes providing a plasma electrolytic apparatus, wherein an electrolyte is provided and a graphite electrode is configured as a cathode of the plasma electrolytic apparatus; and providing a cathodic current so as to initiate a plasma electrolytic process at the graphite electrode to obtain graphite oxide and/or graphene. The graphite oxide and/or graphene can be synthesized through plasma electrolytic processing at relatively low temperature under atmospheric pressure within a very short period of time, without the need for concentrated acids or strong oxidizing agents. The present invention may prepare graphite oxide and/or graphene with plasma electrolytic process directly from graphite, without requiring any prior purification or pretreatment. This plasma electrolytic process of the present invention is quite promising and provided with advantages such as low cost, simple setup, high efficiency, and environmental friendliness.
    Type: Application
    Filed: June 30, 2014
    Publication date: March 5, 2015
    Inventors: Kung-Hwa WEI, Van Thanh DANG
  • Publication number: 20140216944
    Abstract: A graphite oxide or graphene preparation method includes providing a plasma electrolytic apparatus, where an electrolytic solution is provided and a graphite electrode is configured as a cathode of the plasma electrolytic apparatus; and providing a cathodic current so as to initiate a plasma electrolytic process at the graphite cathode to obtain graphite oxide or graphene. The graphite oxide can be synthesized through plasma electrolytic processing at relatively low temperature under atmospheric pressure within a very short period of time, without the need for concentrated acids or strong oxidizing agents. The present invention may prepare graphite oxide with plasma electrolytic process directly from graphite, without requiring any prior purification. This plasma electrolytic process of the present invention is quite promising and provided with advantages such as low cost, simple setup, high efficiency, and environmental friendliness.
    Type: Application
    Filed: August 6, 2013
    Publication date: August 7, 2014
    Applicant: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: KUNG-HWA WEI, VAN THANH DANG
  • Patent number: 8389302
    Abstract: A method for measuring an optoelectronic memory device, includes: grounding a source electrode of the optoelectronic memory device; applying a drain electrode voltage to a drain electrode of the optoelectronic memory device and measuring a first current at the drain electrode; using an optical source to illuminate the optoelectronic memory device and measure a first and a second current at the drain electrode; and comparing the sizes of the first current and the second current so as to judge the functional parameters of the optoelectronic memory device.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: March 5, 2013
    Assignee: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Jeng-Tzong Sheu, Chen-Chia Chen, Mao-Yuan Chiu
  • Publication number: 20120286768
    Abstract: The present invention provides an optoelectronic memory device, the method for manufacturing and evaluating the same. The optoelectronic memory device according to the present invention includes a substrate, an insulation layer, an active layer, source electrode and drain electrode. The substrate includes a gate, and the insulation layer is formed on the substrate. The active layer is formed on the insulation layer, and more particularly, the active layer is formed of a composite material comprising conjugated conductive polymers and quantum dots. Moreover, both of the source and the drain are formed on the insulation layer, and electrically connected to the active layer.
    Type: Application
    Filed: July 26, 2012
    Publication date: November 15, 2012
    Inventors: KUNG-HWA WEI, Jeng-Tzong Sheu, Chen-Chia Chen, Mao-Yuan Chiu
  • Patent number: 8247265
    Abstract: The present invention provides an optoelectronic memory device, the method for manufacturing and evaluating the same. The optoelectronic memory device according to the present invention includes a substrate, an insulation layer, an active layer, source electrode and drain electrode. The substrate includes a gate, and the insulation layer is formed on the substrate. The active layer is formed on the insulation layer, and more particularly, the active layer is formed of a composite material comprising conjugated conductive polymers and quantum dots. Moreover, both of the source and the drain are formed on the insulation layer, and electrically connected to the active layer.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: August 21, 2012
    Assignee: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Jeng-Tzong Sheu, Chen-Chia Chen, Mao-Yuan Chiu
  • Patent number: 8178866
    Abstract: The present invention provides an optoelectronic memory device, the method for manufacturing and evaluating the same. The optoelectronic memory device according to the present invention includes a substrate, an insulation layer, an active layer, source electrode and drain electrode. The substrate includes a gate, and the insulation layer is formed on the substrate. The active layer is formed on the insulation layer, and more particularly, the active layer is formed of a composite material comprising conjugated conductive polymers and quantum dots. Moreover, both of the source and the drain are formed on the insulation layer, and electrically connected to the active layer.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: May 15, 2012
    Assignee: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Jeng-Tzong Sheu, Chen-Chia Chen, Mao-Yuan Chiu
  • Publication number: 20120112756
    Abstract: The present invention provides an optoelectronic memory device, the method for manufacturing and evaluating the same. The optoelectronic memory device according to the present invention includes a substrate, an insulation layer, an active layer, source electrode and drain electrode. The substrate includes a gate, and the insulation layer is formed on the substrate. The active layer is formed on the insulation layer, and more particularly, the active layer is formed of a composite material comprising conjugated conductive polymers and quantum dots. Moreover, both of the source and the drain are formed on the insulation layer, and electrically connected to the active layer.
    Type: Application
    Filed: January 13, 2012
    Publication date: May 10, 2012
    Inventors: Kung-Hwa WEI, Jeng-Tzong Sheu, Chen-Chia Chen, Mao-Yuan Chiu
  • Patent number: 8114315
    Abstract: The present invention provides PHPIT and fabrication thereof. PHPIT has a side-chain-tethered with hexylphenanthrenyl-imidazole polythiophene. The visible light absorption of the PHPIT/PCBM blend is enhanced by the presence of the electron-withdrawing hexylphenanthrenyl-imidazole. The PHPIT/PCBM blend experienced more-balanced electron and hole mobilities and solvability.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: February 14, 2012
    Assignee: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Yao-Te Chang
  • Patent number: 8008427
    Abstract: A novel material of phenanthrenyl imidazole is applied to a solar cell. A phenanthrenyl-imidazole moiety is introduced to reduce a power band of a polymer, so that a photocurrent and an optoelectrical transformation efficiency are improved. Thus, a polymer having the novel material is very suitable to be used in a solar cell to acquire a high optoelectrical transformation efficiency.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: August 30, 2011
    Assignee: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Yao-Te Chang
  • Publication number: 20110028680
    Abstract: A novel material of phenanthrenyl imidazole is applied to a solar cell. A phenanthrenyl-imidazole moiety is introduced to reduce a power band of a polymer, so that a photocurrent and an optoelectrical transformation efficiency are improved. Thus, a polymer having the novel material is very suitable to be used in a solar cell to acquire a high optoelectrical transformation efficiency.
    Type: Application
    Filed: October 11, 2010
    Publication date: February 3, 2011
    Applicant: National Chiao Tung University
    Inventors: Kung-Hwa WEI, Yao-Te Chang
  • Publication number: 20100307592
    Abstract: A three-dimensional ITO electrode and the method of fabricating the same are disclosed. The three-dimensional ITO electrode of the present invention has a conductive layer and a plurality of ITO nanorods formed on the conductive layer, wherein the length range of the ITO nanorods can vary from 10 nm to 1500 nm. The best length is about 50 nm-200 nm for organic solar cells. When applied into organic optoelectronic devices such as organic solar cells and organic light-emitting diodes (OLEDs), the three-dimensional structure of the ITO electrode may increase the contact area to the active layer, thus improving the electric current collecting efficiency and uniformity of current spreading (flowing). Also, an evaporator, a solar cell comprising the above three-dimensional ITO electrode, and the method of fabricating the solar cell are disclosed.
    Type: Application
    Filed: September 21, 2009
    Publication date: December 9, 2010
    Applicant: National Chiao Tung University
    Inventors: Chia-Hua Chang, Pei-Chen Yu, Min-Hsiang Hsu, Kung-Hwa Wei, Ming-Shin Su
  • Patent number: 7846557
    Abstract: The present invention provides a light-emitting diode made of a polymer nanocomposite doped with quantum dots to improve luminescence efficiency and to increase stability and electrical characteristics.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: December 7, 2010
    Assignee: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Chia-Hung Chou
  • Publication number: 20100059714
    Abstract: The present invention provides PHPIT and fabrication thereof. PHPIT has a side-chain-tethered with hexylphenanthrenyl-imidazole polythiophene. The visible light absorption of the PHPIT/PCBM blend is enhanced by the presence of the electron-withdrawing hexylphenanthrenyl-imidazole. The PHPIT/PCBM blend experienced more-balanced electron and hole mobilities and solvability.
    Type: Application
    Filed: April 10, 2009
    Publication date: March 11, 2010
    Applicant: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Yao-Te Chang
  • Publication number: 20100052654
    Abstract: The present invention provides an optoelectronic memory device, the method for manufacturing and evaluating the same. The optoelectronic memory device according to the present invention includes a substrate, an insulation layer, an active layer, source electrode and drain electrode. The substrate includes a gate, and the insulation layer is formed on the substrate. The active layer is formed on the insulation layer, and more particularly, the active layer is formed of a composite material comprising conjugated conductive polymers and quantum dots. Moreover, both of the source and the drain are formed on the insulation layer, and electrically connected to the active layer.
    Type: Application
    Filed: June 15, 2009
    Publication date: March 4, 2010
    Inventors: Kung-Hwa WEI, Jeng-Tzong SHEU, Chen-Chia CHEN, Mao-Yuan CHIU
  • Publication number: 20080051512
    Abstract: One type of electroluminescence polymer that include at least one side-chain-tethered polyhedral oligomeric silsesquioxane that will form self-assembled structure and may build a free volume among the polymers to prevent the polymers from stacking and enhance luminescence efficiency and thermal stability.
    Type: Application
    Filed: October 26, 2006
    Publication date: February 28, 2008
    Inventors: Kung-Hwa Wei, Chia-Hung Chou
  • Publication number: 20080015335
    Abstract: A novel material of phenanthrenyl imidazole is applied to a solar cell. A phenanthrenyl-imidazole moiety is introduced to reduce a power band of a polymer, so that a photocurrent and an optoelectrical transformation efficiency are improved. Thus, a polymer having the novel material is very suitable to be used in a solar cell to acquire a high optoelectrical transformation efficiency.
    Type: Application
    Filed: February 13, 2007
    Publication date: January 17, 2008
    Applicant: National Chiao Tung University
    Inventors: Kung-Hwa Wei, Yao-Te Chang
  • Publication number: 20070154734
    Abstract: The present invention provides a light-emitting diode made of a polymer nanocomposite doped with quantum dots to improve luminescence efficiency and to increase stability and electrical characteristics.
    Type: Application
    Filed: March 17, 2006
    Publication date: July 5, 2007
    Inventors: Kung-Hwa Wei, Chia-Hung Chou