Power recovery of radiation-damaged gallium arsenide and indium phosphide solar cells.
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Radiation damaging to on-orbit solar arrays was found to significantly decrease power output and efficiency. By a process of annealing, these cells can recover some the initial performance parameters. Gallium Arsenide (GaAs) and Indium Phosphide (InP) solar cells were subjected to 1 MeV electron radiation by a Dynamitron linear accelerator at two fluence levels of 1E14 and 1E15 electrons/cm2 . The annealing process was varied by temperature, amount of forward-biased current, light conditions and time. Both types of cells were found to be hardened to radiation; however, the InP cells were superior over the two. Multiple cycles of irradiating and annealing were performed to observe the amount of degradation and recovery. The results prove that substantial recovery will occur, particularly with the InP cells. Applying this process to on-orbit spacecraft utilizing solar arrays as the main source of power will significant increase mission life and potentially decrease cost of the on-board power system.
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Analysis of radiation damaged and annealed gallium arsenide and indium phosphide solar cells using deep level transient spectroscopy techniques Pinzon, Dimas, Jr. (Monterey, California. Naval Postgraduate School, 1991-03);Degradation of solar cell performance from radiation damage was found to be reversed through annealing processes. The mechanisms behind the degradation and recovery is based on deep-level traps, or defects, in the lattice ...
Analysis of radiation damaged and annealed gallium arsenide and indium phosphide solar cells using deep level transient spectroscopy. Bruening, Joseph A. (Monterey, California. Naval Postgraduate School, 1993-09);Power loss in spacecraft solar cells due to radiation damage was investigated. The mechanisms behind the degradation and based on deep-level defects in the crystalline lattice structure of the solar cell. Through a process ...
Annealing of defect sites in radiation damaged indium phosphide solar cells through laser illumination Chase, Charles T. (Monterey, California. Naval Postgraduate School, 1995-12);This thesis reports the results of a laser annealing technique used to remove defect sites from radiation damaged indium phosphide diffused junction solar cells. This involves the illumination of damaged solar cells with ...