Material characterization of a nanocrystal based photovoltaic device M. M. Erwin, A. V. Kadavanich, J. McBride, T. Kippeny, S. Pennycook and S. J. Rosenthal Eur. Phys. J. D, 16 1-3 (2001) 275-277 Published online: 15 September 2001 DOI: 10.1007/s100530170109