Patents by Inventor Denis M. NOTHERN

Denis M. NOTHERN 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).

  • Ultraviolet light emitting diodes
    Patent number: 10361343
    Abstract: The invention provides ultraviolet (UV) light-emitting diodes (LEDs). The UV LEDs can comprise abase layer including p-type SiC or p-type AlGaN, an active layer, and an n-AlGaN layer, wherein the active layer is disposed between the base layer and the n-AlGaN layer. In some embodiments, the absorption losses in p-SiC can be decreased or prevented by incorporating a conductive AlGaN Distributed Bragg Reflector (DBR) between the p-type SiC layer and the active layer. In some embodiments, the n-AlGaN layer can be textured to increase the extraction efficiency (EE). In some embodiments, the external quantum efficiency of the LEDs can be 20-30% or more.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: July 23, 2019
    Assignee: Trustees of Boston University
    Inventors: Gordon C. Brummer, Denis M. Nothern, Theodore D. Moustakas
  • ULTRAVIOLET LIGHT EMITTING DIODES
    Publication number: 20170200865
    Abstract: The invention provides ultraviolet (UV) light-emitting diodes (LEDs). The UV LEDs can comprise abase layer including p-type SiC or p-type AlGaN, an active layer, and an n-AlGaN layer, wherein the active layer is disposed between the base layer and the n-AlGaN layer. In some embodiments, the absorption losses in p-SiC can be decreased or prevented by incorporating a conductive AlGaN Distributed Bragg Reflector (DBR) between the p-type SiC layer and the active layer. In some embodiments, the n-AlGaN layer can be textured to increase the extraction efficiency (EE). In some embodiments, the external quantum efficiency of the LEDs can be 20-30% or more.
    Type: Application
    Filed: July 2, 2015
    Publication date: July 13, 2017
    Applicant: TRUSTEES OF BOSTON UNIVERSITY
    Inventors: Gordon C. BRUMMER, Denis M. NOTHERN, Theodore D. MOUSTAKAS