Optical characterisation of chemically deposited Pb(1−x) CdxS films and a Pb1−xCdxS(n)/Si(p) heterojunctionA. Ounissi, N. Ouddai and S. AchourEur. Phys. J. Appl. Phys., 37 3 (2007) 241-245DOI: https://doi.org/10.1051/epjap:2007034