Spectroscopic Analyses and the Influence of Concentration on the Photoluminescence Characteristics of Sm+3-Doped Silica Sol-Gel matrix. Iraqi Journal of Science [Internet]. 2024 Jun. 30 [cited 2024 Dec. 21];65(6):3122-30. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/8103