Journal
IEEE JOURNAL OF PHOTOVOLTAICS
Volume 9, Issue 2, Pages 552-558Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2018.2889179
Keywords
Cu(In-Ga)Se-2 (CIGS) and CdTe thin film solar cells; space PV; space PV environmental effects; radiation effects
Funding
- National Aeronautics and Space Administration EPSCoR Program [NNX16AQ97A]
- State of Oklahoma OCAST Program [AR18-052-1]
- NASA [NNX16AQ97A, 895163] Funding Source: Federal RePORTER
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Commercially available flexible Cu(In,Ga)Se-2 (CIGS) solar cells are assessed at low-intensity low-temperature (LILT) conditions consistent with those expected in the outer planetary systems of Saturn, Jupiter, and Mars. In these lower temperature environments, evidence of a photo-activated barrier is observed, which is attributed to the contribution of a parasitic barrier at the CIGS/CdS interface that is mediated by metastable defect complexes. However, this barrier only results in a small reduction in performance of the solar cells under LILT conditions. Irradiation with 1.5 MeV protons at very high fluence levels are also presented, resulting in defect-related degradation. However, subsequent self-healing under annealing conditions is also observed that offers potential for sustainable performance of these systems in space conditions.
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