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. 2015 Sep 8;5:13876. doi: 10.1038/srep13876

Figure 3.

Figure 3

(A) UV-visible absorption spectra of pure and Al-doped ZnO nanoparticles. (B) Shifting of Fermi level due to transfer of electrons from valence band to conduction band. (C) (αhν)2 vs photon energy plots of the corresponding sample used to determine their optical band gap energy.