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. 2015 Oct 13;5:15227. doi: 10.1038/srep15227

Figure 8. Proposed schematic mechanism of (Zn)CuInS/ZnS core/shell QDs formation.

Figure 8

First, CuInS QDs with pyramidal chalcopyrite crystalline structure are synthesized at 215 °C (when Cu:In ≤ 1:2). Then, Cu+ and In3+ ions are partically replaced by Zn2+ in the CuInS QDs at 200 °C, leading to Cu and In defective (Zn)CuInS alloyed QDs. Last, coating ZnS shell onto (Zn)CuInS alloyed QDs to obtain (Zn)CuInS/ZnS core/shell QDs at 220 °C.