ABSTRACT
Zinc phthalocyanine (ZnPc) was doped with 1,4-diaminoanthraquinone, anthraflavic acid and 2-ethylanthraquinone. The organic semiconductors obtained were used in the manufacture of thin films, which were characterized . Films were used to prepare (PET/ITO/doped ZnPc/Ag) flexible devices, whose electric conductivity was evaluated as a function of temperature; some of the devices show a considerable increase in their activity up to values of around 2 × 10−11 S/cm to 10 × 10−11 S/cm and 3 × 10−11 S/cm to 8 × 10−11 S/cm for 0.5 and 1.0 V, respectively. Absorbance, Q-band, B-band and optical activation energy were also evaluated by ultraviolet-visible spectroscopy. Optical bandgap Egopt values calculated for the semiconductors have a value of around 1.35 eV. The semiconductor devices were annealed in accelerated time and temperature conditions and their optical activation energy was later re-evaluated. The films exhibit two transitions; the first transition corresponds to the optical bandgap, Egopt, and the second one to the fundamental gap, Eg.
Acknowledgments
The authors wish to thank the technical assistance of Hector Jair Maldonado Ramirez and Q. A. Martín A. Hernández Landaverde.
Disclosure statement
No potential conflict of interest was reported by the authors.