Patents by Inventor Nasser D. Afify

Nasser D. Afify 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).

  • Photovoltaic device with band-stop filter
    Patent number: 11908963
    Abstract: Photovoltaic device with band-stop filter. The photovoltaic device includes an amorphous photovoltaic material and a band-stop filter structure having a stopband extending from a lower limiting angular frequency ?min?0 to an upper limiting angular frequency ?max where ?max>?min. The band-stop filter structure is arranged in the photovoltaic device relative to the photovoltaic material in order to attenuate electromagnetic radiations reaching the photovoltaic material with angular frequencies of ?* in the stopband, so that ?min<?*<?max. The angular frequencies ?* correspond to electronic excitations ??* from valence band tail (VBT) states of the amorphous photovoltaic material to conduction band tail (CBT) states of the amorphous photovoltaic material.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: February 20, 2024
    Assignees: INTERNATIONA BUSINESS MACHINES CORPORATION, EGYPT NANOTECHNOLOGY CENTER
    Inventors: Wanda Andreoni, Alessandro Curioni, Petr Khomyakov, Jeehwan Kim, Devendra K. Sadana, Nasser D. Afify
  • PHOTOVOLTAIC DEVICE WITH BAND-STOP FILTER
    Publication number: 20130312828
    Abstract: Photovoltaic device with band-stop filter. The photovoltaic device includes an amorphous photovoltaic material and a band-stop filter structure having a stopband extending from a lower limiting angular frequency ?min?0 to an upper limiting angular frequency ?max where ?max>?min. The band-stop filter structure is arranged in the photovoltaic device relative to the photovoltaic material in order to attenuate electromagnetic radiations reaching the photovoltaic material with angular frequencies of ?* in the stopband, so that ?min<?*<?max. The angular frequencies ?* correspond to electronic excitations ??* from valence band tail (VBT) states of the amorphous photovoltaic material to conduction band tail (CBT) states of the amorphous photovoltaic material.
    Type: Application
    Filed: May 23, 2013
    Publication date: November 28, 2013
    Inventors: Nasser D. Afify, Wanda Andreoni, Alessandro Curioni, Petr Khomyakov, Jeehwan Kim, Devendra K. Sadana