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Multijunction Solar Cells Optimized for the Mars Surface Solar Spectrum
| Content Provider | Semantic Scholar |
|---|---|
| Author | Edmondson, Kenneth M. Fetzer, Christopher M. Karam, Nasser H. Stella, Paul M. Mardesich, Nick Mueller, Robert L. |
| Copyright Year | 2007 |
| Abstract | This paper gives an update on the performance of the Mars Exploration Rovers (MER) which have been continually performing for more than 3 years beyond their original 90-day missions. The paper also gives the latest results on the optimization of a multijunction solar cell that is optimized to give more power on the surface of Mars. The two Mars rovers, Spirit and Opportunity have been operating on Mars for nearly four years. The operational experience has given mission planners more confidence and ability in predicting power performance for continued operation on Mars. The interaction of dust with the solar cell arrays will be discussed. State of the art multijunction solar cells from Spectrolab have been optimized for the Mars surface solar spectrum at zenith angles of 60°. The surface solar spectrum on Mars is reduced to ~16% of the AM0 intensity, and further reduced in the blue portion of the spectrum. Multiple Mars-optimized cell designs based on spaceheritage GaInP/GaInAs/Ge multijunction solar cells have been grown, fabricated, and tested under a number of different light current-voltage (LIV) test conditions. The device modifications have resulted in further improvement in device performance ranging from 3 to 8% increase in maximum power, or equivalently in efficiency, relative to commercially available AM0-optimized cells. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://trs.jpl.nasa.gov/bitstream/handle/2014/40575/07-3234.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
