Patents Assigned to Sunpreme, Inc.
  • Low-cost solar cells and methods for fabricating low cost substrates for solar cells
    Patent number: 8796066
    Abstract: Substrates for solar cells are prepared by etching a plurality of metallurgical grade wafers; depositing aluminum layer on backside of each wafer; depositing a layer of hydrogenated silicon nitride on front surface of each wafer; annealing the wafers at elevated temperature; removing the hydrogenated silicon nitride without disturbing the aluminum layer. A solar cell is then fabricated on the front surface of the wafer while the aluminum remain to serve as the back contact of the cell.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: August 5, 2014
    Assignee: Sunpreme, Inc.
    Inventors: Ashok Sinha, Wen Ma