Tailoring the Surface Characteristics of CuSe Thin Films by Adjusting the Compositional Ratio

摘要

Using radio frequency (RF) magnetron cosputtering, copper selenide thin films(TFs) with various ratios of Se are fabricated herein. To observe how the chemicaland physical properties change based on morphology, the ratio of metallic Cu tononmetallic Se is tuned to form multiple different compositions. The compositionalpercentage of the surface is determined by X-ray photoelectron spectroscopy(XPS). Noticeable transitions of the characteristics of TFs are affected byCu to a higher degree than Se. Larger grain sizes are observed when the Se ratio ishigh in Cu-rich TFs. Most copper selenide TFs are hydrophobic and portray thesecharacteristics the strongest when the surface Se ratio of TF is 16.62% as thecontact angle with distilled water is 129. In addition, the electrical conductivity isthe highest at 2.04 (±0.13) × 10~7Sm~(-1) when the surface Se ratio is 10.95%.