On the nature of high field charge transport in reinforced silicone dielectrics: Experiment and simulation
Abstract
The high field charge injection and transport properties in reinforced silicone dielectrics were investigated by measuring the time-dependent space charge distribution and the current under dc conditions up to the breakdown field and were compared with the properties of other dielectric polymers. It is argued that the energy and spatial distribution of localized electronic states are crucial in determining these properties for polymer dielectrics. Tunneling to localized states likely dominates the charge injection process. A transient transport regime arises due to the relaxation of charge carriers into deep traps at the energy band tails and is successfully verified by a Monte Carlo simulation using the multiple-hopping model. The charge carrier mobility is found to be highly heterogeneous due to the non-uniform trapping. The slow moving electron packet exhibits a negative field dependent drift velocity possibly due to the spatial disorder of traps.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 01, 2016
- Source ID
- 10.1063/1.4945373
Entities
People
- Linda Schadler
- Yanhui Huang
Organizations
- Office of Naval Research
- Rensselaer Polytechnic Institute