Characterisation of In2S3 and ZnO thin films for photovoltaic application using Photothermal deflection technique M. Paulraj, S. Ramkumar, P.R. Amjith, T. Therasa John, P.M. Ratheeshkumar, C. Sudhakartha, K.P. Vijayakumar and K.G.M. Nair J. Phys. IV France, 125 (2005) 469-472 DOI: 10.1051/jp4:2005125110