Synthesis of Small Ag-Sb-Te Nanocrystals with Composition Control
Ternary telluride nanocrystals have gained increasing interest as materials for thermoelectric, optoelectronic, and phase-change memory applications. Synthetic approaches for colloidal multicomponent tellurides, however, remain sparse. Here, we report a convenient, amide-promoted synthesis for Ag-Sb-Te nanocrystals with small sizes and narrow size distributions (e.g., nanocrystal diameters of 3.5 ± 0.8 nm). We focus on achieving composition control for Ag-Sb-Te nanocrystals by adjusting the ratio of cationic precursors and find a broad solid solution range for AgxSb1-xTe1.5-x nanocrystals (x is from 0.3 and 0.6), which extends beyond that measured in Ag-Sb-Te thin films. The ability to produce size- and composition-controlled Ag-Sb-Te nanocrystals is a first step in achieving bottom-up assembled Ag-Sb-Te semiconductors for device applications.
- This article is part of the themed collection: Journal of Materials Chemistry C Emerging Investigators