“Optical and structural properties of Zn0.94Cu0.04Cr0.02O nanoparticles by two-step annealing”, IJAERD, vol. 5, no. 19, p. -, Aug. 2022, Accessed: Sep. 08, 2025. [Online]. Available: https://ijaerd.org/index.php/IJAERD/article/view/6442