Liton, M. N., Khan, K. R., Rahman, M. M., & Islam, M. M. (2015). Effect of N and Cu Doping on Structure, Surface Morphology and Photoluminescence Properties of ZnO Thin Films. Journal of Scientific Research, 7(1-2), 23–34. https://doi.org/10.3329/jsr.v7i1-2.19573