Structural, Electrical and Dielectric Properties of Dodecylbenzene Sulphonic Acid Doped Polypyrrole/Nano-Y2O3 Composites

We report a facile strategy to synthesized the PPy-DBSA-Y2O3 composites with increasing amount of Y2O3 (2%, 4% and 8%) by in situ polymerization method. The samples were characterized by XRD, FTIR, SEM and dielectric spectroscopy. Structural and morphological analysis reveals the conformation of composite formation, increase in crystallinity and particle size also increased by doping Y2O3 into PPy-DBSA matrix. The frequency dependent AC conductivity (sigma(ac)), dielectric constant (epsilon ') and loss factor (epsilon '') were measured in the frequency range from 20 Hz to 1 MHz. All measured quantities; sigma(ac), epsilon ' and epsilon '' are enhanced with increase in Y2O3 content in the composites at all frequencies. Dielectric constant value for all samples is very high at low frequency however decreases with increase in frequency. Synthesis of PPy-DBSA-Y2O3 composite materials with a large dielectric constant is very important for the improvement of electronic devices applications.