Aluminum doping of poly(vinylidene fluoride with trifluoroethylene) copolymer

The interface between aluminum and crystalline copolymer thin film of vinyl idene fluoride (70%) with trifluoroethylene (30%) [PVDF-TrFE] has been stud ied. The ratio of carbon 1s and aluminum 2p core level photoemission peak i ntensities changes little with increasing emission angle after deposition o f 5 Angstrom aluminum on the surface of PVDF-TrFE. This indicates that the distribution of aluminum atoms in the copolymer film is quite uniform in th e near surface region and that the interface between PVDF-TrFE and aluminum is not abrupt. There is evidence for changes in photohole screening with a luminum doping within the polymer film. (C) 2001 American Institute of Phys ics.