Deep Level Transient Spectroscopy (DLTS) has been used to investigate
hole traps in the depletion region of Schottky barrier diodes formed f
rom electropolymerised poly(3-methylthiophene). The capacitance transi
ents appear to be composed of a fast and a slow component. Analysis of
the slower component using the ''rate window'' technique yields isoch
ronal differential capacitance curves that depend on temperature in th
e manner predicted by theory.