Space-charge-limited currents and trap-filled limit in one-dimensional insulators
Abstract
Reference is made to a study by Wilson (1982), which gave an approximate solution for the space-charge-limited current case for the voltage region below the trap-filled limit. This approximate solution is extended here to cover the problem of space-charge-limited currents in one-dimensional insulators containing traps, with particular attention given to the trap-filled limit region. While use is made of some of Wilson's concepts, his hypothesis of the low-field saturated drift velocity is not adhered to. The equations are derived on the assumption that the field and concentrations of free and trapped carriers are constant throughout the samples and are equal to their average values. It is pointed out that results obtained in such a way are known (Lampert and Mark, 1970) to differ from exact solutions by a factor that does not exceed 2.
- Publication:
-
Journal of Physics D Applied Physics
- Pub Date:
- January 1984
- DOI:
- 10.1088/0022-3727/17/1/018
- Bibcode:
- 1984JPhD...17..135S
- Keywords:
-
- Insulators;
- Solid State Physics;
- Space Charge;
- Volt-Ampere Characteristics;
- Approximation;
- Trapped Particles;
- Solid-State Physics