Preparation of CuO Thin Film with Corncob-Like Morphology via Chemical Solution Processing

摘要

Uniform and crack-free cupric oxide (CuO) films have been prepared by chemical bath deposition method simply using Cu(NO3)2 and ammonia. Crystal structure and morphology of the deposited CuO films were characterized by XRD and SEM. The results illustrate that well defined nanostructured CuO thin film with unique morphologies can be deposited onto glass slide substrate at 40-80 °C for 1 -5 h with pH value ranging from 8.5-10. Unique elliptic sheet-like morphology can be obtained at higher temperature (≥ 70 °C), while interesting corncob-like nano-structured CuO film can be obtained at lower temperature (≤ 60 °C). Ammonia is the key parameter to the film deposition. It has much effect on morphology of the obtained film in the range of 2.6-3.0 mL, as well as not on deposition duration.