“Structural, Optical and Raman Characterization of Nano-Crystalline Cu Doped ZnO Thin Films Deposited by Pulse Laser Deposition Technique”, GJSFR, vol. 19, no. A9, pp. 43–49, Oct. 2019, Accessed: Aug. 14, 2026. [Online]. Available: https://www.journalofscience.org/index.php/GJSFR/article/view/2535