Influence of Cu-Doping Concentration on the Structural and Optical Properties of SnO₂ Nanoparticles by Coprecipitation Route

Figure 5

EDX spectra of (a) pure SnO₂; (b) 1% Cu-doped; (c) 3% Cu-doped; (d) 4% Cu-doped SnO₂ nanoparticle.