Copper oxide nanostructured thin films processed by SILAR for optoelectronic applications.

Obviously, there is a decreasing trend of optical bandgap with increasing film as represented in Fig. 9(d) , probably due to the bigger grains usually existing in the thicker films, which verifies the results stated by Nair et al. 111 Fig. 10(a)–(c) demonstrates the Cu 2 O nanostructured films fabricated with different dipping cycles of the nanorods spread homogeneously on the substrate surface, showing a large number of grains with fine particle edges.

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