Patents by Inventor Stephen Edward Derenzo

Stephen Edward Derenzo 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).

  • Codoped direct-gap semiconductor scintillators
    Patent number: 7404913
    Abstract: Fast, bright inorganic scintillators at room temperature are based on radiative electron-hole recombination in direct-gap semiconductors, e.g. CdS and ZnO. The direct-gap semiconductor is codoped with two different impurity atoms to convert the semiconductor to a fast, high luminosity scintillator. The codopant scheme is based on dopant band to dopant trap recombination. One dopant provides a significant concentration of carriers of one type (electrons or holes) and the other dopant traps carriers of the other type. Examples include CdS:In,Te; CdS:In,Ag; CdS:In,Na; ZnO:Ga,P; ZnO:Ga,N; ZnO:Ga,S; and GaN:Ge,Mg.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: July 29, 2008
    Assignee: The Regents of the University of California
    Inventors: Stephen Edward Derenzo, Edith Bourret-Courchesne, Marvin J. Weber, Mattias K. Klintenberg