Accession Number : AD0432192

Title :   INVESTIGATION OF THIN FILM CADMIUM SULFIDE SOLAR CELLS.

Descriptive Note : Quarterly technical progress rept. no. 1, 25 Nov 63-25 Feb 64,

Corporate Author : HARSHAW CHEMICAL CO CLEVELAND OHIO

Personal Author(s) : Schaefer,J. C. ; Humrick,R. J. ; Belt,R. F.

Report Date : 06 MAR 1964

Pagination or Media Count : 55

Abstract : The purpose of this program is to continue the research and development on large area, thin film flexible, light weight cadmium sulfide solar cells. Higher efficiency stable cells with a high power to weight ratio are goals of this program. Higher efficiency cells appear probable when the barrier is formed chemically. Cells have been fabricated for exposure to gamma radiation at NRL. New contacting techniques are being investigated for application on the one square foot and one-half square foot arrays. A rear wall thin film CdS photovoltaic cell can be produced. A considerable effort would be needed to perfect this into an efficient and usable item. Further work has been abandoned. The principal vacuum evaporation parameters of substrate temperature and surface perfection have been studied for CdS depositions. Thin films of CdS were prepared on Mo, Ta, Ti, Invar 36, quartz, Si and CaF2. Substrate temperatures ranged from 200 to 650 C. Ti shows excellent promise for reducing the total cell weight. Annealing, doping and chemical reactions were studied to increase output efficiencies of production cells. (Author)

Descriptors :   (*SOLAR CELLS, FILMS), (*CADMIUM COMPOUNDS, SULFIDES), VAPOR PLATING, VACUUM APPARATUS, QUARTZ, TANTALUM, SILICON, FLUORIDES, COPPER COMPOUNDS, CALCIUM COMPOUNDS, TITANIUM, NICKEL ALLOYS, IRON ALLOYS, ELECTROPLATING, PH FACTOR, COPPER, SULFUR, ZIRCONIUM, MOLYBDENUM, TUNGSTEN, HEAT TREATMENT, OPTICAL PROPERTIES, ELECTROPLATING, SOLUTIONS(MIXTURES)

Distribution Statement : APPROVED FOR PUBLIC RELEASE