Characterization of chemical bath deposited CdS thin films doped with methylene blue and Er3+S. A. Tomás, R. Lozada-Morales, O. Portillo, H. Lima-Lima, R. Palomino-Merino and O. ZelayaEur. Phys. J. Special Topics, 153 (2008) 299-302DOI: https://doi.org/10.1140/epjst/e2008-00450-4