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Title: Bifacial tandem solar cells

A method of fabricating on a semiconductor substrate bifacial tandem solar cells with semiconductor subcells having a lower bandgap than the substrate bandgap on one side of the substrate and with subcells having a higher bandgap than the substrate on the other including, first, growing a lower bandgap subcell on one substrate side that uses only the same periodic table group V material in the dislocation-reducing grading layers and bottom subcells as is present in the substrate and after the initial growth is complete and then flipping the substrate and growing the higher bandgap subcells on the opposite substrate side which can be of different group V material.
Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
1257254
Assignee:
MASIMO SEMICONDUCTOR, INC. (Irvine, CA) ORNL
Patent Number(s):
9,368,671
Application Number:
14/507,607
Resource Relation:
Patent File Date: 2014 Oct 06
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE

Other works cited in this record:

Fundamentals of Solar Cells
book, July 2005
  • Randall, Julian F.
  • Designing Indoor Solar Products Photovoltaic Technologies for AES
  • DOI: 10.1002/0470017155.ch4

A 27.3% efficient Ga0.5In0.5P/GaAs tandem solar cell
journal, February 1990
  • Olson, J. M.; Kurtz, S. R.; Kibbler, A. E.
  • Applied Physics Letters, Vol. 56, Issue 7, p. 623-625
  • DOI: 10.1063/1.102717

40.8% efficient inverted triple-junction solar cell with two independently metamorphic junctions
journal, September 2008
  • Geisz, J. F.; Friedman, D. J.; Ward, J. S.
  • Applied Physics Letters, Vol. 93, Issue 12, Article No. 123505
  • DOI: 10.1063/1.2988497

Substrate structures for InP-based devices
patent, October 1990

Monolithic tandem solar cell
patent, May 1991

Monolithic tandem solar cell
patent, June 1994

Bilayer passivation structure for photovoltaic cells
patent, July 2001

Multi-junction, monolithic solar cell using low-band-gap materials lattice matched to GaAs or Ge
patent, August 2001

Multijunction photovoltaic cells and panels using a silicon or silicon-germanium active substrate cell for space and terrestrial applications
patent, January 2002

Voltage-matched, monolithic, multi-band-gap devices
patent, August 2006

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