Patents by Inventor Kethinni G. Chittibabu

Kethinni G. Chittibabu 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).

  • Publication number: 20200395492
    Abstract: Provided herein are improvements to dye-sensitized photovoltaic cells that enhance the ability of those cells to operate in normal room lighting conditions. These improvements include printable, non-corrosive, nonporous hole blocking layer formulations that improve the performance of dye-sensitized photovoltaic cells under 1 sun and indoor light irradiation conditions. Also provided herein are highly stable electrolyte formulations for use in dye-sensitized photovoltaic cells. These electrolytes use high boiling solvents, and provide unexpectedly superior results compared to prior art acetonitrile-based electrolytes. Also provided herein are chemically polymerizable formulations for depositing thin composite catalytic layers for redox electrolyte-based dye-sensitized photovoltaic cells. The formulations allow R2R printing (involves coating, fast chemical polymerization, rinsing of catalytic materials with methanol) composite catalyst layers on the cathode.
    Type: Application
    Filed: August 26, 2020
    Publication date: December 17, 2020
    Applicant: AMBIENT PHOTONICS, INC.
    Inventors: Kethinni G. Chittibabu, John C. Warner
  • Patent number: 9515274
    Abstract: This disclosure features an article that includes first and second electrodes, a photoactive layer between the first and second electrodes, and a hole carrier layer between the first electrode and the photoactive layer. The hole carrier layer includes a Cu(I)-containing material. The article is configured as a photovoltaic cell.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: December 6, 2016
    Assignee: MERCK PATENT GMBH
    Inventors: Kethinni G. Chittibabu, Nirupama Kattamuri, Franz Rene Kogler, David P. Waller, Allesandro Zedda
  • Publication number: 20140053897
    Abstract: This disclosure features a system that includes first and second electrodes; first and second photoactive layers between the first and second electrodes; and a recombination material between the first and second photoactive layers. The first photoactive layer is between the first electrode and the recombination material. The second photoactive layer is between the second electrode and the recombination material. The recombination material includes a first hole blocking layer and a first hole carrier layer. The first hole blocking layer includes an n-type semiconductor material and a polyamine, at least some molecules of the polyamine being cross-linked. The system is configured as a photovoltaic system.
    Type: Application
    Filed: October 10, 2013
    Publication date: February 27, 2014
    Applicant: Merck Patent GmbH
    Inventors: Srinivasan Balasubramanian, Kethinni G. Chittibabu, Robert D. Eckert, Russell Gaudiana, Nirupama Kattamuri, Michael Lee, David P. Waller
  • Publication number: 20140026964
    Abstract: This disclosure features an article that includes first and second electrodes, a photoactive layer between the first and second electrodes, and a hole carrier layer between the first electrode and the photoactive layer. The hole carrier layer includes a Cu(I)-containing material. The article is configured as a photovoltaic cell.
    Type: Application
    Filed: July 30, 2013
    Publication date: January 30, 2014
    Applicant: Merck Patent GmbH
    Inventors: Kethinni G. Chittibabu, Nirupama Kattamuri, Franz Rene Kogler, David P. Waller, Allesandro Zedda
  • Publication number: 20120090679
    Abstract: Solid state dye sensitized photovoltaic cells, as well as related components, systems, and methods, are disclosed.
    Type: Application
    Filed: March 16, 2010
    Publication date: April 19, 2012
    Applicant: Konarka Technologies, Inc.
    Inventors: Kethinni G. Chittibabu, Michael Graetzel, David P. Waller, Srini Balasubramanian, Kevin Coakley, Jin-An He, Jean Francois Penneau, Igor Sokolik
  • Patent number: 8071874
    Abstract: The invention, in one aspect, provides a photovoltaic cell including a charge carrier material and a photosensitized interconnected nanoparticle material including nanoparticles linked by a polymeric linking agent, both disposed between first and second rigid, significantly light-transmitting substrates. In one embodiment, the charge carrier material and the photosensitized interconnected nanoparticle material are disposed between a first and second flexible, significantly light-transmitting substrate that are themselves disposed between the first and second rigid, significantly light-transmitting substrates.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: December 6, 2011
    Assignee: Konarka Technologies, Inc.
    Inventors: Bill Beckenbaugh, Russell Gaudiana, Kethinni G. Chittibabu
  • Publication number: 20110220188
    Abstract: Solid state dye sensitized photovoltaic cells, as well as related components, systems, and methods, are disclosed.
    Type: Application
    Filed: May 12, 2011
    Publication date: September 15, 2011
    Applicant: Konarka Technologies, Inc.
    Inventors: Christoph Josef Brabec, Kethinni G. Chittibabu, David Waller
  • Patent number: 7894694
    Abstract: Photovoltaic materials and methods of photovoltaic cell fabrication provide a photovoltaic cell in the form of a fiber. These fibers may be formed into a flexible fabric or textile.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: February 22, 2011
    Assignee: Konarka Technologies, Inc.
    Inventors: Russell Gaudiana, Lian Li, Kethinni G. Chittibabu, Robert D. Eckert, Alan Montello, Edmund Montello, Paul Wormser
  • Patent number: 7829781
    Abstract: Modules are disclosed. The modules can include: a first photovoltaic cell including an electrode; a second photovoltaic cell including an electrode; and an interconnect that connects the electrodes of first and second photovoltaic cells. The interconnect can include: an electrically insulative material adhesive material; and a mesh partially disposed in the adhesive material.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: November 9, 2010
    Assignee: Konarka Technologies, Inc.
    Inventors: Alan Montello, Kevin Oliver, Kethinni G. Chittibabu
  • Patent number: 7777128
    Abstract: Modules are disclosed. The modules can include a first photovoltaic cell including an electrode; and a second photovoltaic cell including an electrode having a bent end connected to the electrode of the first photovoltaic cell.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: August 17, 2010
    Assignee: Konarka Technologies, Inc.
    Inventors: Alan Montello, Kevin Oliver, Kethinni G. Chittibabu
  • Publication number: 20080217587
    Abstract: Photovoltaic materials and methods of photovoltaic cell fabrication provide a photovoltaic cell in the form of a fiber. These fibers may be formed into a flexible fabric or textile.
    Type: Application
    Filed: March 18, 2008
    Publication date: September 11, 2008
    Inventors: RUSSELL GAUDIANA, LIAN LI, KETHINNI G. CHITTIBABU, ROBERT D. ECKERT, ALAN MONTELLO, EDMUND MONTELLO, PAUL WORMSER
  • Patent number: 7323635
    Abstract: A method of making a photovoltaic cell includes contacting a cross-linking agent with semiconductor particles, and incorporating the semiconductor particles into the photovoltaic cell.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: January 29, 2008
    Assignees: University of Massachusetts, The United States of America as represented by the Secretary of the Army
    Inventors: Kethinni G. Chittibabu, Jin-An He, Lynne Ann Samuelson, Lian Li, Susan Tripathy, legal representative, Jayant Kumar, Srinivasan Balasubramanian, Sukant Tripathy, deceased
  • Patent number: 7220914
    Abstract: Zwitterionic compounds, photovoltaic cell charge carrier layers containing such compounds, photovoltaic cells including such charge carrier layers, and related methods are disclosed.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: May 22, 2007
    Assignee: Konarka Technologies, Inc.
    Inventors: Kethinni G. Chittibabu, Savvas Hadjikyriacou, David Waller
  • Patent number: 7094441
    Abstract: A polymeric linking agent enables the manufacture of photovoltaic cells on flexible substrates, including, for example, polymeric substrates. Photovoltaic cells may be fabricated by a relatively simple continuous manufacturing process, for example, a roll-to-roll process, instead of a batch process.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: August 22, 2006
    Assignee: Konarka Technologies, Inc.
    Inventors: Kethinni G. Chittibabu, Russell Gaudiana, Bill Beckenbaugh, Lian Li, Michael Lee
  • Publication number: 20040194821
    Abstract: A method of making a photovoltaic cell includes contacting a cross-linking agent with semiconductor particles, and incorporating the semiconductor particles into the photovoltaic cell.
    Type: Application
    Filed: April 21, 2004
    Publication date: October 7, 2004
    Applicant: University of Massachusetts Lowell, a Massachusetts corporation
    Inventors: Kethinni G. Chittibabu, Jin-An He, Lynne Ann Samuelson, Lian Li, Sukant Tripathy, Susan Tripathy, Jayant Kumar, Srinivasan Balasubramanian
  • Publication number: 20030056821
    Abstract: A method of making a photovoltaic cell includes contacting a cross-linking agent with semiconductor particles, and incorporating the semiconductor particles into the photovoltaic cell.
    Type: Application
    Filed: June 10, 2002
    Publication date: March 27, 2003
    Inventors: Kethinni G. Chittibabu, Jin-An He, Lynne Ann Samuelson, Lian Li, Sukant Tripathy, Susan Tripathy, Jayant Kumar, Srinivasan Balasubramanian
  • Patent number: 5935491
    Abstract: The invention features a method of making a gradient-index polymer rod involving the steps of: combining a polymer with an additive, wherein the refractive index of the polymer material is different than the refractive index of the additive material; extruding the polymer and the additive into a polymer rod having a substantially uniform index of refraction profile; and immersing the rod having the substantially uniform index of refraction profile in a non-solvent under conditions and for a time that enables the non-solvent to permeate the rod and out-diffuse a portion of the additive material, thereby producing the gradient-index polymer rod. The rod produced by the method can be drawn into a graded index polymer fiber. The invention also features a gradient-index polymer rod (or fiber) of condensation-type polymer that is doped with an additive material.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: August 10, 1999
    Assignee: University of Massachusettes
    Inventors: Sukant Tripathy, Kethinni G. Chittibabu, Jayant Kumar