Characterization of the synthesized NPs
UV visible absorption
The UV–vis absorption spectra of ZnO materials are depicted in Fig. 2(a). Both samples exhibited UV–vis absorption spectra, with a wide intense absorption from about 350 nm, which may be linked to the intrinsic absorption of the BG of ZnO NPs caused by electron (e−) transfer out from VB towards the CB34,43,44,45,46.
Since ZnO is a direct band gap Semicond., its ABS coefficient (α) is correlated to the…
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