Phase transitions during formation of Ag nanoparticles on In2S3 precursor layers

Abstract Phase transitions have been investigated for silver deposition onto In 2 S 3 precursor layers by spray chemical vapor deposition from a trimethylphosphine (hexafluoroacetylacetonato) silver (Ag(hfacac)(PMe 3 )) solution. The formation of Ag nanoparticles (Ag NPs) on top of the semiconductor layer set on concomitant with the formation of AgIn 5 S 8 . The increase of the diameter of Ag NPs was accompanied by the evolution of orthorhombic AgInS 2 . The formation of Ag 2 S at the interface between Ag NPs and the semiconductor layer was observed. Surface photovoltage spectroscopy indicated charge separation and electronic transitions in the ranges of corresponding band gaps. The phase transition approach is aimed to be applied for the formation of plasmonic nanostructures on top of extremely thin semiconducting layers.