Mobil Solar Energy Corporation Thin EFG Octagons, Annual Subcontract Report, 1 April 1992 - 30 September 1992
This report describes work carried out for the PVMaT program at Mobil Solar for the period covering April 1, 1992, to September 30, 1992. Mobil Solar is developing advanced technology for growing and cutting 200-{mu}m-thick edge-defined film-fed growth (EFG) octagon tubes that will reduce the manufacturing costs of 10-cm {times} 10-cm polycrystalline EFG silicon wafers. Mobil Solar has made progress in identifying factors that impact on thickness nonuniformity and means to reduce the deleterious impact of ambient-related effects that have caused reduction in crystal growth productivity and wafer yield. The current main obstacle to meeting material yield targets arises due to the buckling produced by thermal stress. Studies of laser cutting of EFG silicon using ND:YAG and dye lasers are underway to develop reduced damage cutting methods. Mobil Solar has carried out design reviews for crystal growth and laser cutting equipment. A task has been initiated to evaluate new online sensors for crystal growth process control and to study implementation of advanced control concepts for productivity and yield improvements.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 10189431
- Report Number(s):
- NREL/TP-411-5738; ON: DE93018222
- Resource Relation:
- Other Information: PBD: Sep 1993
- Country of Publication:
- United States
- Language:
- English
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Thin EFG Octagons: Annual Subcontract Report, 1 April 1992 - 31 March 1993
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