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VERTICAL MULTIJUNCTION PHOTOVOLTAIC CELLS WITH BURIED SILICIDE INTERCONNECTIONS

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
12111
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
12111
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Spire Corporation
One Patriots Park Bedford, MA 01730-2396
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1991
Title: VERTICAL MULTIJUNCTION PHOTOVOLTAIC CELLS WITH BURIED SILICIDE INTERCONNECTIONS
Agency: NASA
Contract: N/A
Award Amount: $491,578.00
 

Abstract:

WE PROPOSE TO STUDY VERTICAL MULTIJUNCTION CELLS FOR PHOTOVOLTAIC CONVERSION OF HIGH-INTENSITY LASER RADIATION AT 1.06 MICRONS. THE SERIES-CONNECTED MULTIJUNCTION STRUCTURE RESULTS IN LOW SERIES RESISTANCE, WHICH IS CRUCIAL TO EFFICIENT CONVERSION AT THE INTENSITY LEVELS CONTEMPLATED. A SMALL JUNCTION WIDTH, FURTHERMORE, WOULD MAKE POSSIBLE EFFICIENT COLLECTION OF LONG-WAVELENGTH LIGHT WITHOUT A LONG CARRIER DIFFUSION LENGTH, RESULTING IN GOOD RADIATION RESISTANCE. IN ORDER TO ACHIEVE THE SMALL JUNCTION WIDTH (10 TO 20 MICRONS) WHICH IS NEEDED, WE WILL USE ION IMPLANTED SILICIDES FOR THE METAL INTERCONNECTION LAYERS. COSI2, WHICH HAS A HIGH CONDUCTIVITY AND A SMALL LATTICE MISMATCH WITH SILICON, CAN BE FORMED AS A BURIED LAYER BY ION IMPLANTATION OF COBALT AND ANNEALING. HIGH-QUALITY EPITAXIAL SILICON CAN BE GROWN ON THE TOP LAYER AFTER THIS PROCESS. THIN FILMS PRODUCED BY THIS METHOD ARE GENERALLY COHERENT AND UNIFORM AND THEIR INTERFACES ARE SHARP AND FREE FROM CONTAMINATION. IN ADDITION, BURIED SILICIDES ACT AS A GETTER OF THEIR OWN METAL FROM THE BULK SILICON, PREVENTING CONTAMINATION OF THE SOLAR CELL ACTIVE LAYER BY THE IMPLANTED METALS.

Principal Investigator:

Patricia Sekula-moi
Senior Scientist
6172756000

Business Contact:

Richard s. gregorio
TREASURER
6172756000
Small Business Information at Submission:

Spire Corp.
Patriots Park Bedford, MA 01730

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No