INVESTIGATION OF PHYSICAL PROPERTIES OF SEMICONDUCTORS
Abstract
Research effort was devoted to the investigation of materials which may have interesting semiconducting properties at high temperatures. In particular, solid solutions and compounds of metals and tungsten trioxide were investigated. It was found that lead forms solid solutions with tungsten trioxide over a wide composition range but has metallic electrical properties. Copper tungstate and a compound containing a small amount of silver in tungsten trioxide had interesting semiconducting properties. Aluminum boride was a semiconductor with a large activation energy. Coupled with the preparation, chemical analysis and determination of electrical properties of these compounds, a crystal structure determination of triclinic copper tungstate was initiated. A study of the Faraday effect at microwave frequencies on n- and p-type germanium and silicon was carried out over a wide temperature range as a function of the static magnetic field, leading to information regarding the effective masses, life-times and mobilities of the charge carriers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1960
- Accession Number
- AD0283273
Entities
People
- Max E. Caspari
Organizations
- University of Pennsylvania