Radiation and Charge Transport Phenomena in Improved Hardened Insulators.
Abstract
Previous efforts to effectively investigate and model the high-field charging phenomenon in pyrolytic Al2O3 have been thwarted by the difficulty of separating the injection and trapping phenomena. Characterizing the injection is extremely difficult because the interface electric field varies as charge accumulates in traps, and the varying field produces rapidly varying currents, making it equally difficult to ascertain trapping behavior. In this report high-field electron injection and photoinjection into Al2O3 are investigated using new experimental techniques which maintain constant the interface fields and injection currents, thereby permitting independent determination of injection and trapping characteristics. Studies of field and temperature dependence provide strong evidence that the electron injection occurs by trap-assisted tunneling. Isochronal thermal annealing results are also presented, and a preliminary model for radiation-induced charging is suggested. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1974
- Accession Number
- AD0778690
Entities
People
- Richard J. Powell
Organizations
- RCA Corporation