Patents by Inventor Bikash Kumar

Bikash Kumar 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 Cell and Production Thereof
    Publication number: 20080271780
    Abstract: An efficient photovoltaic cell, and its process of manufacture, is disclosed wherein the back surface p-n junction is removed from a doped substrate having an oppositely doped emitter layer. A front surface and edges and optionally the back surface periphery are masked and a back surface etch is performed. The mask is not removed and acts as an anti-reflective coating, a passivating agent, or both. The photovoltaic cell retains an untextured back surface whether or not the front is textured and the dopant layer on the back surface is removed to enhance the cell efficiency. Optionally, a back surface field is formed.
    Type: Application
    Filed: July 14, 2008
    Publication date: November 6, 2008
    Applicants: BP Corporation North America Inc., Tata BP Solar India Limited
    Inventors: Srinivasamohan Narayanan, Bikash Kumar
  • Photovoltaic cell and production thereof
    Patent number: 7402448
    Abstract: An efficient photovoltaic cell, and its process of manufacture, is disclosed wherein the back surface p-n junction is removed from a doped substrate having an oppositely doped emitter layer. A front surface and edges and optionally the back surface periphery are masked and a back surface etch is performed. The mask is not removed and acts as an anti-reflective coating, a passivating agent, or both. The photovoltaic cell retains an untextured back surface whether or not the front is textured and the dopant layer on the back surface is removed to enhance the cell efficiency. Optionally, a back surface field is formed.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: July 22, 2008
    Assignee: BP Corporation North America Inc.
    Inventors: Srinivasamohan Narayanan, Bikash Kumar
  • Photovoltaic cell and production thereof
    Publication number: 20040259335
    Abstract: An efficient photovoltaic cell, and its process of manufacture, is disclosed wherein the back surface p-n junction is removed from a doped substrate having an oppositely doped emitter layer. A front surface and edges and optionally the back surface periphery are masked and a back surface etch is performed. The mask is not removed and acts as an anti-reflective coating, a passivating agent, or both. The photovoltaic cell retains an untextured back surface whether or not the front is textured and the dopant layer on the back surface is removed to enhance the cell efficiency. Optionally, a back surface field is formed.
    Type: Application
    Filed: January 28, 2004
    Publication date: December 23, 2004
    Inventors: Srinivasamohan Narayanan, Bikash Kumar