Ribbon Growth of Single Crystal GaAs for Solar Cell Application.
Abstract
This report describes the results of a 3-year effort to develop GaAs dendritic web for high-efficiency solar cells. A unique GaAs ribbon growth system was developed by applying dentritic-web growth techniques to a liquid-encapsulated GaAs system. Computerized thermal modelling and experimental modification produced a thermal geometry from which 48 GaAs webs were grown. These crystals had a multidendrite and/or faceted morphology rather than typical web morphology. Crystal quality improved as thermal geometry, growth techniques, dendrite seeds, and melt chemistry were optimized during the course of the program; however, conventional web morphology was not achieved. Analyses of chemical modification, crystal-growth characteristics, and orientation relationships suggest that inherent materials properties of GaAs produce an typical web morphology under conventional web-growth conditions. Consequently, a simple transfer of Si web growth technology to our GaAs system was inadequate for the growth of high quality GaAs web.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1981
- Accession Number
- ADA112038
Entities
People
- Raymond G. Seidensticker
- Robert Mazelsky
- Theresa A. Gould