Dang, C., Le, D., Nguyen, T., & Dang, D. (2013). Characteristics and optical properties of Fe3+ doped SiO2/TiO2 thin films prepared by the sol-gel dip-coating method. Science and Technology Development Journal, 16(1), 92-100. https://doi.org/https://doi.org/10.32508/stdj.v16i1.1424