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Title: Broad spectrum solar cell

An alloy having a large band gap range is used in a multijunction solar cell to enhance utilization of the solar energy spectrum. In one embodiment, the alloy is In.sub.1-xGa.sub.xN having an energy bandgap range of approximately 0.7 eV to 3.4 eV, providing a good match to the solar energy spectrum. Multiple junctions having different bandgaps are stacked to form a solar cell. Each junction may have different bandgaps (realized by varying the alloy composition), and therefore be responsive to different parts of the spectrum. The junctions are stacked in such a manner that some bands of light pass through upper junctions to lower junctions that are responsive to such bands.
 [1] ;  [2] ;  [3] ;  [4]
  1. (Kensington, CA)
  2. (Lafayette, CA)
  3. (Richmond, CA)
  4. (Ithaca, NY)
Publication Date:
OSTI Identifier:
Report Number(s):
US patent application 10/445,711
DOE Contract Number:
Resource Type:
Research Org:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Sponsoring Org:
Country of Publication:
United States