DocumentCode :
1523776
Title :
Experimental Results From Performance Improvement and Radiation Hardening of Inverted Metamorphic Multijunction Solar Cells
Author :
Patel, Pragati ; Aiken, Dan ; Boca, Andreea ; Cho, Benjamin Youngjae ; Chumney, Daniel ; Clevenger, M. B. ; Cornfeld, A. ; Fatemi, Navid ; Lin, Yashen ; McCarty, Jessica ; Newman, F. ; Sharps, Paul ; Spann, John ; Stan, Mircea ; Steinfeldt, J. ; Strautin,
Author_Institution :
EMCORE Corporation , Albuquerque, USA
Volume :
2
Issue :
3
fYear :
2012
fDate :
7/1/2012 12:00:00 AM
Firstpage :
377
Lastpage :
381
Abstract :
This paper discusses results from continued development of inverted metamorphic multijunction (IMM) solar cells with air mass zero (AM0) conversion efficiencies greater than 34%. An experimental best four-junction IMM (IMM4J) design is presented. In an effort to improve IMM performance in space radiation environments, 1-MeV electron irradiation studies are conducted on the individual IMM4J subcells. These data are used to engineer an IMM4J structure with beginning of life AM0 conversion efficiency of approximately 34% and an end of life (EOL) remaining factor greater than 82%, where EOL is defined as performance after exposure to 1-MeV electron irradiation at 1E15 e/cm 
fluence. Next-generation IMM designs are explored and an avenue toward AM0 conversion efficiencies of greater than 35% is presented.
Keywords :
Electron devices; Gallium arsenide; Indium gallium arsenide; Performance evaluation; Photoelectricity; Photonic band gap; Photovoltaic cells; Electron devices; photoelectricity; photovoltaic cells; semiconductor devices;
fLanguage :
English
Journal_Title :
Photovoltaics, IEEE Journal of
Publisher :
ieee
ISSN :
2156-3381
Type :
jour
DOI :
10.1109/JPHOTOV.2012.2198048
Filename :
6204303
Link To Document :
