Patents by Inventor Denis O. DEMCHENKO

Denis O. DEMCHENKO 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).

  • Direct-gap group IV alloy nanocrystals with composition-tunable energy gaps and near-infrared photoluminescence
    Patent number: 11566173
    Abstract: Colloidal synthesis of narrowly disperse, near IR emitting Group IV alloy quantum dots with wide range of Sn compositions via reduction of precursor halides is provided, allowing for less-toxic, earth abundant, and silicon-compatible Group IV alloy quantum dots for application in a broad range of electronic and photonic technologies.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: January 31, 2023
    Assignee: Virginia Commonwealth University
    Inventors: Indika U. Arachchige, Umit Ozgur, Denis O. Demchenko, Venkatesham Tallapally, Tanner A. Nakagawara
  • P-TYPE BERYLLIUM DOPED GALLIUM NITRIDE SEMICONDUCTORS AND METHODS OF PRODUCTION
    Publication number: 20220344539
    Abstract: Exemplary devices such as ultraviolet light emitting diodes (UV LEDs) are disclosed which include conductive Be-doped p-type material with greatly improved efficiency over UV LEDs employing other dopants such as Mg. Exemplary processes for producing Be-doped p-type regions in semiconductor devices are also described.
    Type: Application
    Filed: April 25, 2022
    Publication date: October 27, 2022
    Inventors: Michael A. Reshchikov, Denis O. Demchenko
  • DIRECT-GAP GROUP IV ALLOY NANOCRYSTALS WITH COMPOSITION-TUNABLE ENERGY GAPS AND NEAR-INFRARED PHOTOLUMINESCENCE
    Publication number: 20210062084
    Abstract: Colloidal synthesis of narrowly disperse, near IR emitting Group IV alloy quantum dots with wide range of Sn compositions via reduction of precursor halides is provided, allowing for less-toxic, earth abundant, and silicon-compatible Group IV alloy quantum dots for application in a broad range of electronic and photonic technologies.
    Type: Application
    Filed: March 18, 2019
    Publication date: March 4, 2021
    Inventors: Indika U. ARACHCHIGE, Umit OZGUR, Denis O. DEMCHENKO, Venkatesham TALLAPALLY, Tanner A. NAKAGAWARA