Terrestrial Stability of ITO/INP Solar Cells


Solar cells based on ITO/InP have been shown to possess aremarkable potential for space applications. The determination of the terrestrial and simulated-space stability of any type of solar cell is important in obtaining the payload power requirements of a spacecraft which will be powered by that type of cell. In this work, a preliminary investigation of the terrestrial stability of ITO/InP cells has been performed. The cells were stored in the dark for six months in thermostatically-controlled custom-built chambers maintained at 25°C and 60°C. Current voltage (I-V) and capacitance-voltage (C-V) measurements were taken every two weeks over the six months period. The results show an increase in Isc which indicates an enhancement in the spectral response of the cells. The junction carrier concentration, depletion layer widths and VOC were found to be fairly constant indicating that the junction is stable under the storage conditions employed.

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