Cadmium stannate selective optical films for solar energy applications. Quarterly progress report 1 jul-30 sep 75

Technical Report · Wed Oct 01 00:00:00 EDT 1975

OSTI ID:6565572

Haacke, G; Burton, L C

Modification of the post-deposition heat treatment procedure for sputter coated cadmium stannate films has improved their electrical properties significantly. Coatings with electrical conductivities between 4500 and 5000/ohm/cm can now be prepared. With the higher electrical conductivities a given sheet resistance can be achieved with thinner coatings so that the optical film transmission increases. The sheet resistance of spray-coated cadmium stannate films could be reduced four-fold. Sheet resistances in the 20-30 ohm/square range have been achieved. Development of the backwall CdS solar cell has concentrated on a suitable etching procedure for the cadmium sulfide layer. The problem of cell short circuits has been solved and backwall efficiencies of 5% and better were observed under tungsten illumination. An analysis of the dependence of cell efficiency on the cadmium stannate thickness indicates that 1.0-1.5 micrometers is the optimum range for present cell parameters.

• Research Organization: American Cyanamid Co., Stamford, CT. Chemical Research Div.
• OSTI ID: 6565572
• Report Number(s): PB-283313
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
CADMIUM COMPOUNDS
CADMIUM STANNATES
CADMIUM SULFIDE SOLAR CELLS
COATINGS
DEPOSITION
DIMENSIONS
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ETCHING
HEAT TREATMENTS
OXYGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
SOLAR CELLS
SPECTRALLY SELECTIVE SURFACES
SPRAY COATING
SPRAYED COATINGS
SPUTTERING
STANNATES
SURFACE COATING
SURFACE FINISHING
SURFACES
THICKNESS
TIN COMPOUNDS