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Keywords:

  • 68.55.am;
  • 68.55.Ln;
  • 78.30.Jw;
  • 78.40.Me;
  • 78.66.Qn;
  • 81.15.Gh

Abstract

The doping with I2-vapour and dopant effusion of thin films of conjugated oligomers are reported in this work. The layers have been created solvent-free, by initiated chemical vapour deposition (iCVD). FTIR spectra show an interaction of the dopant with the phenyl ring of the oligomer. Reflectance/transmittance measurements showed a saturation of the dopant in the 400 nm thick layers after 40 min. The films change from transparent to brown-green in the doping process and show a drastic increase in conductivity. The material is quite easily processable and can be grown at an adequate rate (∼3.5 nm/min) for thin film device applications.