Patents by Inventor Yunhua Xu

Yunhua Xu 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).

  • Tetrakis(1-imidazolyl) borate (BIM4) based zwitterionic and related molecules used as electron injection layers
    Patent number: 8367839
    Abstract: Tetrakis(1-imidazolyl)borate (BIm4) based zwitterionic and/or related molecules for the fabrication of PLEDs is provided. Device performances with these materials approaches that of devices with Ba/Al cathodes for which the cathode contact is ohmic. Methods of producing such materials, and electron injection layers and devices containing these materials are also provided.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: February 5, 2013
    Assignee: The Regents of the University of California
    Inventors: Huaping Li, Yunhua Xu, Guillermo C. Bazan
  • Tetrakis(1-imidazolyl) borate (BIM4) based zwitterionic and related molecules used as electron injection layers
    Publication number: 20100145062
    Abstract: Tetrakis(1-imidazolyl)borate (BIm4) based zwitterionic and/or related molecules for the fabrication of PLEDs is provided. Device performances with these materials approaches that of devices with Ba/Al cathodes for which the cathode contact is ohmic. Methods of producing such materials, and electron injection layers and devices containing these materials are also provided.
    Type: Application
    Filed: December 1, 2009
    Publication date: June 10, 2010
    Inventors: Huaping Li, Yunhua Xu, Guillermo C. Bazan
  • CONJUGATED OLIGOELECTROLYTE ELECTRON TRANSPORTING LAYERS
    Publication number: 20090230362
    Abstract: An organic electronic or an optoelectronic device containing a conjugated oligoelectrolyte. In more particularized embodiments, the conjugated oligoelectrolyte is the charge injection or transport layer. The conjugated oligoelectrolyte can be positively or negatively charged, and used in conjunction in a device with either or high or low work function metal.
    Type: Application
    Filed: January 26, 2009
    Publication date: September 17, 2009
    Inventors: Guillermo C. Bazan, Yunhua Xu, Renqiang Yang, Thuc-Quyen Nguyen