Part 19: Impedance-Potential (IMPE)

The impedance-potential method increments potential E from the initial potential to the final potential. A continuous sine wave is superimposed on the base potential. Current and voltage are sampled and analyzed for real and imaginary impedance components. The impedance is recorded as a function of potential. The following figure shows the applied potential waveform as a function of time.


Fig. 19-1 Impedance-Potential waveform.
Fig. 19-1 Impedance-Potential waveform.



Fig. 19-2 Mott-schottky plot.
Fig. 19-2 Mott-schottky plot.

-Types of data that can be plotted

  1. LogZ - E
  2. phase - E
  3. Z - E
  4. Z' - E
  5. Z" - E
  6. log(Z" & Z') - E
  7. logY - E
  8. Y - E
  9. Y' - E
  10. Y" - E
  11. log(Y' & Y") - E
  12. Rs - E
  13. Os - E
  14. Rp - E
  15. Cp - E
  16. 1/(Cs*Cs) - E : Mott-schottky
  17. 1/(Cp*Cp) - E : Mott-schottky
last modified 2022/12/20