Preparation and properties of evaporated CdTe films compared with single crystal CdTe. Progress report No. 2, February 1-April 30, 1981

Technical Report · Thu Jan 01 00:00:00 EST 1981

DOI:https://doi.org/10.2172/6299176· OSTI ID:6299176

Bube, R H

The design, construction and testing of the hot-wall vacuum evaporation system is proceeding on schedule. The vacuum system, a Varian 3118 diffusion pump system, has been installed and tested. A calculation of the optimum possible efficiency for an n-p CdTe homojunction indicates a value of 14%. A complete background is given on the growth of over fifty CdTe single crystals at Stanford, the last four of which were grown as part of this program. Use of crystal regrowth and vibration during growth both increase crystal quality. Higher electrical activity of phosphorus acceptors in CdTe is achieved when 0.1% excess Te is used in place of 0.5% excess Te. Careful characterization of boules grown for this program are underway, using Hall effect or capacitance-voltage data on selected samples. Initial investigation of the properties of grain boundaries in p-type CdTe : P crystals indicates a grain boundary height of 0.44 eV unaffected by illumination. These results suggest that grain boundaries are more strongly pinned in p-type than in n-type CdTe.

• Research Organization: Solar Energy Research Inst. (SERI), Golden, CO (United States); Stanford Univ., CA (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: AC02-77CH00178
• OSTI ID: 6299176
• Report Number(s): SERI/PR-9330-1-T2; ON: DE81023079
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
CADMIUM TELLURIDES
CRYSTAL GROWTH
GRAIN BOUNDARIES
VACUUM EVAPORATION
CADMIUM TELLURIDE SOLAR CELLS
CRYSTAL DOPING
EFFICIENCY
ELECTRICAL PROPERTIES
INSTALLATION
PHOSPHORUS
TESTING
CADMIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL STRUCTURE
DIRECT ENERGY CONVERTERS
ELEMENTS
EQUIPMENT
EVAPORATION
MICROSTRUCTURE
NONMETALS
PHASE TRANSFORMATIONS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
SOLAR CELLS
SOLAR EQUIPMENT
TELLURIDES
TELLURIUM COMPOUNDS
SOLAR
CDTE FILMS
EVAPORATED
SINGLE CRYSTAL
140501* - Solar Energy Conversion- Photovoltaic Conversion