Preparation Of PVP.BtB Thin Films by Spin Coating Technique and Study the Structural and Optical Properties for Optical Filters Application. Journal of the College of Basic Education, [S. l.], v. 32, n. 135, p. 176–188, 2026. DOI: 10.35950/cbej.v32i135.14619. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/14619.. Acesso em: 3 aug. 2026.