Abstract:
The prime source of accumulated space charges is
considered to be the electrode injected charges. Although the
injection phenomenon is majorly modeled using the well-known
Schottky Injection mechanism, which gives a theoretically
constant boundary electric field throughout the duration of the
applied field. However, on careful observation of experimental
results, obtained from the pulsed electro-acoustic method, a
systematic trend of temporal variation can be observed in the
boundary electric fields and hence boundary charges. Also, an
uneven distribution of homocharges has been observed upon
field application throughout the duration of field application,
having a larger concentration of holes near anode in
comparison to the cathode. Here, the temporal variation of the
boundary electric field and corresponding boundary charge has
been discussed. Besides this, the reason of uneven distribution
of holes is explained with the help of holes transportation using
the hopping mechanism.
