PREPARATION AND OPTICAL ANALYSIS OF COPPER SULPHIDE THIN FILM USING CHEMICAL BATH DEPOSITION METHOD. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 6, n. 3, p. 307 – 312, 2022. DOI: 10.33003/fjs-2022-0603-1079. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/1079. Acesso em: 12 sep. 2025.