Influence of atmospheric pollutants on the conductance of phthalocyanine films

Molecular oxygen has always been considered as the main gaseous agent respo nsible for the doping of intrinsically insulating phthalocyanine thin films . In this paper, it is shown that oxygen has only a relatively minor effect on electrical conductance and that traces (<100 ppb) of nitrogen dioxide p resent in ambient atmosphere play a much more important role especially in the presence of water vapour. The effects of chlorine and ozone at the same concentration have also been investigated. (C) 1999 Elsevier Science S.A. All rights reserved.