Abstract
Zinc tin phosphide (ZTP) has attracted recent research interest as a low-cost light sensing material, alternative to III–V and II–III-based compounds, for photo-detector and solar cell applications. In this study, a versatile chemical route for the synthesis of ZTP nanoparticles starting from commercially available alkyl-zinc and tin, alkyl-phosphoramides and trioctylphosphine at a relatively low temperature of 160 °C is reported, which can straightforwardly be extended to other analogous II–IV-P2 group ternary compounds. The particles displayed high stability and can be deposited as layers with few monolayers of thickness. The structural and chemical analysis revealed that the particles are of sub-10 nm size with chalcopyrite structure and ZnSn-phosphide composition. The particles exhibited optical band-gap in the range of 1.65–1.75 eV and a broadband photo-response in the visible wavelengths (400–700 nm) with excellent response to red light.
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