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Solid solutions of CuInSe2-ZnSe have recently shown promising potential as a photovoltaic material. In this work we investigate the CuInSe2-ZnSe and CuGaSe2-ZnSe systems for high Voc photovoltaic applications. It was found that the highest Voc (∼740 mV) was achieved when the In/(In+Ga) ratio in the precursor was 0.13, i.e. very Ga-rich composition. Selenization conditions of CuZnGaIn metallic precursors...
Cu2ZnSnSe4 (CZTSe) solar cells were prepared at high temperatures on Si/SiO2 sodium free substrate. Si/SiO2 was used as substrate to study the formation of CZTSe absorber without the possible influence of Na and for analyzing its compatibility with Si microelectronic technology. This substrate allowed reaching higher temperatures than the ones commonly used with soda lime glass (SLG). An efficiency...
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