Theory of radiationinduced and carrierenhanced conductivity  Space charge and contact effects
Abstract
The PECK (Parker enhanced carrier kinetics) model is developed for interpreting experimental results on conductivity in dielectrics. In the model, based on steady state solutions of general kinetic equations for electrons and holes, it is assumed that the holes are instantaneously trapped into deep traps, while the electrons hop from shallow trap to shallow trap and are described as quasifree with a lowered trapmodulated effective mobility. This simplifies the description of the system to the Poisson equation and a single transport equation for the electrons. Raw data on a 6.4micron biased sample of Kapton, penetrated by a 28keV incident electron beam, are considered for interpretation. It is shown that current measurements at zero bias can be interpreted in terms of the shape of the excesscharge deposition profile. Measurements at high bias are matched by the model with an appropriate choice for the trapmodulated electron mobility (approximately 7 x 10 to the 15th sq m/Vs), provided injection is assumed to occur at the cathode contact.
 Publication:

IEEE Transactions on Nuclear Science
 Pub Date:
 December 1984
 DOI:
 10.1109/TNS.1984.4333513
 Bibcode:
 1984ITNS...31.1368P
 Keywords:

 Carrier Injection;
 Carrier Transport (Solid State);
 Dielectrics;
 Electrical Resistivity;
 Radiation Effects;
 Space Charge;
 Boltzmann Transport Equation;
 Carrier Mobility;
 Kinetic Equations;
 Poisson Equation;
 Semiconductors (Materials);
 Steady State;
 Electronics and Electrical Engineering