Doping Efficiency in Cobalt-Doped ZnO Nanostructured Materials

Figure 4

X-ray diffraction (XRD) pattern of (a) 0.1 M cobalt nitrate-doped samples, (b) 0.1 M cobalt chloride-doped samples, (c) 0.1 M cobalt chloride-doped samples annealed at 300°C, and (d) 15% cobalt-doped ZnO after annealing at 300°C with different precursors and concentrations. Evidence of the Simonkolleite phase, Zn₅(OH)₈Cl₂·H₂O, in cobalt chloride-doped ZnO is shown in (b).

(a)

(b)

(c)

(d)