Geometrical optimization and electrical performance comparison of thin-film tandem structures based on pm-Si:H and μc-Si:H using computer simulationF. Dadouche, O. Béthoux, M. E. Gueunier-Farret, E. V. Johnson, P. Roca i Cabarrocas, C. Marchand and J. P. KleiderEPJ Photovolt., 2 (2011) 20301DOI: https://doi.org/10.1051/epjpv/2011001