Controlled crystallite orientation in ZnO nanorods prepared by chemical bath deposition: Effect of H2O2

ZnO nanorods with controlled crystallite orientation are grown on glass substrate by chemical bath deposition (CBD) method via hydrogen peroxide (H2O2) route. The crystallite orientation in the film is successfully controlled by varying content of H2O2 in the bath solution. The crystallites became increasingly oriented as content of H2O2 in the bath solution increased, resulting in the formation of vertically aligned ZnO nanorods. The possible growth mechanism for the vertically aligned ZnO nanorods is proposed. The influence of content of H2O2 in the bath solution on structural, surface morphological, electrical and optical properties is studied and reported.

► ZnO nanorods with sub 100 nm regime are synthesized by chemical method.
► The effect of H2O2 on the crystallite orientation of ZnO nanorods are studied along with the effect of H content of H2O2 on the structural, electrical and optical properties.
► The thin films deposited with 2 vol.% H2O2 shows highly textured, vertically aligned ZnO nanorods.