DocumentCode :
3342624
Title :
High-efficiency silicon solar cells for low-illumination applications
Author :
Glunz, S.W. ; Dicker, J. ; Esterle, M. ; Hermle, M. ; Isenberg, J. ; Kamerewerd, F.J. ; Knobloch, J. ; Kray, D. ; Leimenstoll, A. ; Lutz, F. ; Osswald, D. ; Preu, R. ; Rein, S. ; Schäffer, E. ; Schetter, C. ; Schmidhuber, H. ; Schmidt, H. ; Steuder, M. ;
Author_Institution :
Fraunhofer ISE, Freiburg, Germany
fYear :
2002
fDate :
19-24 May 2002
Firstpage :
450
Lastpage :
453
Abstract :
At Fraunhofer ISE the fabrication of high-efficiency solar cells was extended from a laboratory scale to a small pilot-line production. Primarily, the fabricated cells are used in small high-efficiency modules integrated in prototypes of solar-powered portable electronic devices such as cellular phones, handheld computers etc. Compared to other applications of high-efficiency cells such as solar cars and planes, the illumination densities found in these mainly indoor applications are significantly below 1 sun. Thus, special care was taken to keep the cell efficiency level high even at very low illumination levels. For this reason, particularly the cell border was analyzed and optimized carefully. The excellent cell characteristics achieved at low illumination densities increase the benefit of a solar power supply for such devices by an order of magnitude if compared to standard solar cells.
Keywords :
lighting; mobile handsets; notebook computers; power supplies to apparatus; solar cells; Fraunhofer ISE; cell border; cell efficiency; cellular phones; fabrication; handheld computers; high-efficiency cells; high-efficiency silicon solar cells; illumination densities; indoor applications; laboratory scale; low-illumination applications; small high-efficiency modules; small pilot-line production; solar cars; solar planes; solar power supply; solar-powered portable electronic devices; Application software; Cellular phones; Fabrication; Handheld computers; Laboratories; Lighting; Photovoltaic cells; Production; Prototypes; Silicon;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Photovoltaic Specialists Conference, 2002. Conference Record of the Twenty-Ninth IEEE
ISSN :
1060-8371
Print_ISBN :
0-7803-7471-1
Type :
conf
DOI :
10.1109/PVSC.2002.1190556
Filename :
1190556
Link To Document :
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