STUDY OF FIELD ASSISTED PHOTOCONDUCTIVITY.
Abstract
Research concerns an investigation of means for increasing the sensitivity of the vidicon target. A field assisted mechanism is proposed which employs a thin blocking insulator film. With a thin insulator, thermal excited carriers in the photoconductor are prevented from contributing significantly to the signal current, but a strong field allows photon excited carriers to penetrate the insulator conduction band. The emphasis was on an insulator - photoconductor combination rather than on a photoconductor target alone. Three different insulators and a group of storage photoconductors were evaluated in a series of vidicons constructed during this period. The combination of insulator - photoconductor was shown to affect the properties of storage photoconductors, especially the dark current characteristics. Very good sensitivity was observed in many of the targets fabricated. Although the decay time was also affected, still there remains a long time decay tail which presents a problem to be further investigated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 14, 1963
- Accession Number
- AD0422342
Entities
People
- V. J. Santilli
Organizations
- Westinghouse Electric Corporation