@article{article9b6e3897,
title   = {Substitutional impurities in ppv crystals: an intrinsic donor-acceptor system for high voc photovoltaic devices},
author = {Calzolari, Arrigo and Ruini, Alice and Cavazzoni, Carlo and Caldas, Marília Junqueira},
year = {2010},
journal   = {Journal of Physical Chemistry C : Nanomaterials and Inferfaces 2006}
}