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THE DOPING EFFICIENCY OF BORON IN SILICON SOLAR CELLS IS LIMITED BY THE…

Award Information

Agency:
Department of Energy
Branch:
N/A
Award ID:
2543
Program Year/Program:
1985 / SBIR
Agency Tracking Number:
2543
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
UES, Inc.
4401 Dayton-Xenia Road Dayton, OH 45432-1894
View profile »
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1985
Title: THE DOPING EFFICIENCY OF BORON IN SILICON SOLAR CELLS IS LIMITED BY THE PRESENCE OF OXYGEN WHICH FORMS A COMPLEX WITH BORON.
Agency: DOE
Contract: N/A
Award Amount: $48,662.00
 

Abstract:

THE DOPING EFFICIENCY OF BORON IN SILICON SOLAR CELLS IS LIMITED BY THE PRESENCE OF OXYGEN WHICH FORMS A COMPLEX WITH BORON. SPECIFICALLY, THE INTERSTITIAL BORON-INTERSTITIAL OXYGEN DEFECT STRUCTURE IS CREATED WHEN THE BORON CONCENTRATION IS IN THE RANGE OF 5 X 10 14 TO 2 X 10 16 ATOMS/CM3 IN CONJUNCTION WITH AN OXYGEN CONCENTRATION OF 4 X 10 16 TO 3 X 10 17 ATOMS/ CM3. THE MAXIMUM DEFECT CONCENTRATION REPORTED BY DREVINSKY AND DE ANGELIS IS 4 X 10 13 ATOMS/CM3 WHICH INDICATED THAT ONLY ONE IN A THOUSAND OXYGEN ATOMS WILL COMPLEX WITH BORON. THE INTERSTITIAL BORON-INTERSTITIAL OXYGEN MINORITY CARRIER TRAP CAN NOT BE ELIMINATED UNLESS ALL THE INTERSTITIAL OXYGEN ATOMS ARE REMOVED OR TRAPPED. HEAT TREATMENT AT 650 DEGREES TO 800 DEGREES CELSIUS FOR 20 HOURS OR 1000 DEGREES CELSIUS FOR 20 HOURS WILL PRODUCE OXYGEN AGGLOMERATES THAT WILL TRAP INTERSTITIAL OXYGEN ATOMS. THIS REDUCES THE NUMBER OF INTERSTITIAL OXYGEN ATOMS WHICH WOULD BE AVAILABLE TO COMPLEX WITH BORON. THE ADVANTAGE OF THIS TECHNIQUE IS THAT NO IMPURITIES HAVE BEEN ADDED TO THE SILICON THAT COULD REDUCE THE EFFICIENCY OF THE SOLAR CELL. MOST OTHER HEAT-TREATMENT PROCEDURES COULD BE USED SUB- SEQUENTLY IN PROCESSING THE SOLAR CELL AND NOT DESTROY THE INERT OXYGEN COMPLEX. THE NEWLY CREATED OXYGEN COMPLEX IS VERY STABLE; ONLY HEAT TREATMENT AT 1350 DEGREES CELSIUS WOULD CAUSE DISASSOCIATION.

Principal Investigator:

Mr. john baker
PRINCIPAL INVESTIGATOR
5134266900

Business Contact:

Small Business Information at Submission:

Universal Energy Systems,
4401 Dayton Xenia Road Dayton, OH 45432

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