Abstract
Silver doped zinc sulfide (ZnS:Ag) metal nanoparticles (NPs) were successfully synthesized and used as a dopant in thin-film organic solar cells (TFOSCs). Core-shell structured ZnS:Ag nano-particle is expected to improve photon harvesting in solar absorber medium. Polymers blend composed of poly-(3-hexylthiophene) (P3HT): [6,6]-phenyl C61 butyric acid methyl ester (PC61BM) were used as absorber medium with and without ZnS:Ag metal NPs. The concentrations of the metal NPs were varied to investigate the effect of doping level in the generation photocurrent. Significant device performances were recorded with short-circuit current (Jsc) of 14.30 mAcm−2, fill factor (FF) of 52.63%, and PCE performance of 4.50% was achieved at 3% concentration by weight. Such an improvement is likely attributed to the presence of localized surface plasmonic resonance (LSPR) effect at the metal/polymer interfaces, which plays an essential role in augmenting the charge transport processes and augmenting the optical absorption. The results further indicate that PCE value has enhanced dramatically by 98% compared to the pristine reference cell. The finding of our investigation will be deliberated based on the measured optoelectronic and morphological properties of newly synthesized ZnS:Ag metal NPs and device performances.
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