Sb 2 S 3 -based extremely thin absorber (ETA) solar cells of structure, , was fabricated with porous TiO 2 surface treating by Mg 2+, Ba 2+, and Al 3+ to be full-inorganic printed solar cells. The fabrication parameters of the ETA structure were optimized and the photovoltaic characteristics were improved significantly when double treatment in Mg 2+ and Ba 2+ were introduced. Best cells obtained using double treatment in Mg 2+ and Ba 2+ attained a short-circuit photocurrent of 13.4 mA/cm 2, a open-circuit voltage of 0.584 V, a fill factor of 0.525, and a conversion efficiency 4.10% at 1 sun irradiation.
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Tsujimoto et al. (2012) studied this question.