An Investigation of Spray Deposited CdO Films and CdO/p-Si Heterojunction at Different Substrate Temperatures

• Published in: JOM (1989) Vol. 73; no. 2; pp. 566 - 573
• Main Authors: Turgut, G., Aydogan, S., Yilmaz, M., Özmen, A., Kacus, H.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2021; Springer Nature B.V
• Subjects: Advanced Coating and Thin Film Materials for Energy; Aerospace and Biological Applications; Chemistry/Food Science; Crystal structure; Earth Sciences; Engineering; Environment; Heterojunctions; Morphology; Optical properties; Physics; Silicon substrates; Spray pyrolysis; Temperature; Thin films
• ISSN: 1047-4838; 1543-1851
• DOI: 10.1007/s11837-020-04514-9

In this study, CdO films were successfully obtained by using a homemade chemical spray pyrolysis technique. The crystal structures of the CdO thin films improved due to an increase in the substrate temperature when the spray time was kept constant. Additionally, CdO film deposited at 250°C exhibited amorphous crystal structure. The surface morphology of the samples was evaluated by scanning electron microscope (SEM) and it was observed that well-defined granules started to be clearly seen when the substrate temperature increased. Optical properties of CdO films were also investigated by using an ultraviolet–visible (UV–Vis) spectrophotometer, and the optical band gap of CdO varied from 2.57 eV to 2.73 eV with increasing substrate temperature. The electrical performance of the CdO films in the Au/CdO/p-Si device were determined by I – V measurements. According to the results, it was found that diode parameters depend on the changing properties of CdO in terms of the substrate temperature.