Study of the interface changes during operation of nCdTe-electrolyte solar cells
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Previous work has shown that while nCdTe-electrolyte solar cells are low cost and efficient, their photocurrent decays after a few hours of operation. We ave systematically analyzed the changes that take place at the interface. Auger spectroscopy measurements have shown out-diffusion of Cd2 and the formation of a Te layer at the surface. Electroreflectance (ER) and electroluminescence measurements have further shown that this process results in the formation of a p-type region. The evolution of the ER spectra as the p-type region develops was followed and fully analyzed. This technique offers the advantage of easy control and optimization of the p-n junction growth parameter. The influence of the Te layer on the cell performance was determined from spectral response measurements.
Previous work has shown that while nCdTe-electrolyte solar cells are low cost and efficient, their photocurrent decays after a few hours of operation. We ave systematically analyzed the changes that take place at the interface. Auger spectroscopy measurements have shown out-diffusion of Cd2%2b and the formation of a Te layer at the surface. Electroreflectance (ER) and electroluminescence measurements have further shown that this process results in the formation of a p-type region. The evolution of the ER spectra as the p-type region develops was followed and fully analyzed. This technique offers the advantage of easy control and optimization of the p-n junction growth parameter. The influence of the Te layer on the cell performance was determined from spectral response measurements.
