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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Fetzer, Chris Jun, Bongim Edmondson, Kenneth Khemthong, Scott Rouhani, Kaveh Cravens, Robert Bardfield, Rina Gillanders, Mark |
| Copyright Year | 2008 |
| Description | Author affiliation: Spectrolab, Inc., 12500 Gladstone Ave., Sylmar, CA 91342 USA (Fetzer, Chris; Jun, Bongim; Edmondson, Kenneth; Khemthong, Scott; Rouhani, Kaveh; Cravens, Robert; Bardfield, Rina; Gillanders, Mark) |
| Abstract | Spectrolab presents its next production GaInP/GaAs/Ge space triple junction solar cell, the XTJ space solar cell, averaging 29.8% efficiency at maximum power (AM0, 28°C, 135.3 $mW/cm^{2})$ at beginning-of-life (BOL) testing of large populations (845 cells) of large-area solar cells without coverglass. Bare cells from this population with area of 26.62 $cm^{2}$ have been tested to a maximum efficiency of 31.1% under the same AM0 testing. Additional optical and electrical performance characterization will be presented. XTJ is more than a BOL power improvement over heritage products. Bare cell radiation testing shows power retention at max power (NP) of 0.89 and 0.84 after irradiation with 1-MeV energy electrons to a fluence of 5e14 $cm^{−2}$ and 1e15 $cm^{−2},$ respectively. Environmental degradation testing of XTJ parts shows only 1.7% degradation for more than 4000 hours at 250°C and no degradation after 90 days at 95% r.h. and 45°C. Together these characteristics enable XTJ to be a 7% improvement in end-of-life cost of power on space flight panel over Spectrolab's 28% BOL efficient UTJ. Finally, XTJ engineering confidence thermal cycle testing and qualification status to the AIAA S-111-2005 standard will be elaborated. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 3853846 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424416400 |
| ISSN | 01608371 |
| DOI | 10.1109/PVSC.2008.4922620 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-05-11 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Production Photovoltaic cells Testing Thermal degradation Gallium arsenide Electron optics Costs Aerospace engineering Power engineering and energy Thermal engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering |
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