Authors : Dr. Madhukeswara R. S.

Volume/Issue : Volume 11 - 2026, Issue 8 - August

---

Google Scholar : https://tinyurl.com/y995s3f7

Scribd : https://tinyurl.com/5n7ew758

DOI : https://doi.org/10.38124/ijisrt/26aug608

Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.

---

Abstract : CuO thin films were deposited on quartz and Si substrates by spray pyrolysis using a 0.1 M copper acetate precursor at a substrate temperature of 350 °C for 4 min and subsequently air-annealed at 450 and 500 °C for 1 h. The influence of annealing temperature on the structural, optical, electrical, and photo response properties of the films was investigated. XRD analysis confirmed the formation of predominantly single-phase monoclinic CuO, with improved crystallinity after annealing. The crystallite size increased from 5.22 nm for the as-deposited film to 8.13 nm for the C4-A500 film, while the crystallinity increased from 61.9% to 85.6%.

Keywords : Copper Oxide, Spray Pyrolysis, Heterojunction, Responsivity.

References :

1. Kuryshchuk, S. I., Orletskii, I. G., Shyrokov, O. V., Myroniuk, D. V., & Solovan, M. M. (2022). Optical and electrical properties of CuO thin films by spray pyrolysis method. Acta Physica Polonica A, 142(5), 625. DOI: 10.12693/APhysPolA.142.625
2. Daira, R., Boudjema, B., & Mohammedi, A. (2023). Structural, optical and electrical properties of CuO thin films deposited by spray pyrolysis technique: Influence annealing process. Chalcogenide Letters, 20(4), 277–284.  DOI: 10.15251/CL.2023.204.277
3. Saâd, H. B., Ajili, M., Dabbabi, S., & Kamoun, N. T. (2020). Investigation on thickness and annealing effects on physical properties and electrical circuit model of CuO sprayed thin films. Superlattices and Microstructures, 142, 106508. DOI: 10.1016/j.spmi.2020.106508
4. Hassan, M. A., Mohsin, M. H., & Ismail, R. A. (2023). Preparation of high-responsivity strontium-doped CuO/Si heterojunction photodetector by spray pyrolysis. Journal of Materials Science: Materials in Electronics, 34(10), 912. DOI: 10.1007/s10854-023-10348-3
5. Wu, R., Yang, H., Cheng, Y., Huang, S., & Zhang, C. (2025). A self-powered p-CuO/n-Si heterojunction-type ultraviolet photodetector. ACS Applied Nano Materials, 8(23), 12243–12250. DOI: 10.1021/acsanm.5c01970
6. Hong, Q., Cao, Y., Xu, J., Lu, H., He, J., & Sun, J.-L. (2014). Self-powered ultrafast broadband photodetector based on p–n heterojunctions of CuO/Si nanowire array. ACS Applied Materials & Interfaces, 6(23), 20887–20894. DOI: 10.1021/am5054338.