Deposition time effect on copper oxide nano structures, an analysis study using chemical method

• Published in: Journal of materials science. Materials in electronics Vol. 35; no. 6; p. 427
• Main Authors: Abbas, Roaa A., Salim, Evan T., Mahdi, Rana O.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2024; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemical fingerprinting; Chemical properties; Chemical synthesis; Chemistry and Materials Science; Copper; Copper oxides; Crystallites; Deionization; Electron microscopes; Energy gap; Field emission microscopy; Figure of merit; Grain size; Hydrothermal crystal growth; Materials Science; Metal oxides; Optical and Electronic Materials; Optical properties; Oxidation; Raman spectroscopy; Reaction time; Substrates; Surface roughness; Thin films; Time measurement; Valence
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-024-12143-0

Copper oxide was synthesis by hydrothermal method using copper nano powder (30nm) and deionized water on quartz substrate. At temperature 100 °C, different experimental time ranging from (24–72 h). Different copper oxide phase was presented in X-Ray diffraction analyzer, the crystal size increased as the reaction time increased as it calculated using scherrer equation to be (21.1–32.03 nm), and Williamson Hall plot to be (40.3–87.7 nm). Also, Raman spectroscopy show different copper phase and the highest intensity peak at 220 cm −1 , due to the cuprous oxide in all sample used to distinct chemical fingerprint for a particular molecule or material. Many of metal oxide bond was study by FTIR to clarify the compositional and chemical properties of the prepared samples. Optical characteristic with different absorption peaks of thin film show decrease in the band gap from (2.8–2.4 eV) as the reaction time increase. PL measurement used also to determine the band gap energy of the prepared thin film which found to be agreement with UV–Vis, and the band gap value is (2.7, 2.6, 2.5, 2.3, and 2.3 eV), respectively. Increasing in the surface roughness from (3.637–25.16 nm), and in the root mean square from (5–29.39 nm), and grain size with increasing the reaction time from (24–72 h), respectively, was measured by using AFM technique. Different morphologies were showed with increasing the reaction time, spherical and truncated octahedral in different type was obtained by field emission-scanning electron microscope (FE-SEM) as the particles subject to transformation caused the preparing agglomerated crystallites. The electrical characteristic was analysis use DC measurement to measure the activation energy which varied with reaction time. The figure of merit analysis shows that the copper oxidation state to obtain cuprous oxide (Cu 2 O) is mainly obtained at the 48 h-reaction time. The used of copper nano powder in hydrothermal method without adding any auxiliary material the main aim of this research.