Development of copper sulfide/cadmium sulfide thin-film solar cells. Twelfth technical progress report, April 1, 1982 to June 30, 1982

Technical Report · Fri Oct 29 04:00:00 EDT 1982

OSTI ID:6676063

Szedon, J R; Krishnaswamy, S V; McMullin, P G; Eldridge, G W

Among the major accomplishments during this period have been the characterization of effects on cell performance due to ion implantation and to laser-annealing treatments. The combination of initial laser treatment and furnace annealing reduced the difference in space-charge field associated with the upper and lower branches of the photovoltaic response curves (ln J/sub SC/ vs. V/sub OC/). The change in the lower branch behavior should lead to improved fill factor. For the upper branch behavior, the effect was to increase opposing current and reduce open-circuit voltage capability. After succeeding laser treatments, the open-circuit voltage for excitation near AMl was restored as the opposing current pre-exponential factor was reduced. Short-circuit current loss was noted for both implantation and laser treatments, with differences depending on the kind of treatment. Implantation of either /sup 24/Mg/sup +/ or /sup 22/Ne/sup +/, without subsequent treatment, caused reductions in short-circuit current density, probably because of reductions in minority carrier diffusion length due to implantation damage. With laser treatment of an experimental cell, the loss in short-circuit current increased with decreasing J/sub SC/. This was probably due to a change in heterojunction collection efficiency related to the photomodulation of traps, not involved in the tunneling control of opposing current. Laser treatment suppressed an excess photocurrent which was present when a Kodak Type 96 N. D. 1 filter was used to characterize cells after furnace anneals.

• Research Organization: Westinghouse Research and Development Center, Pittsburgh, PA (USA)
• DOE Contract Number: AC02-77CH00178
• OSTI ID: 6676063
• Report Number(s): SERI/PR-8143-1-T11; ON: DE83004077
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
AGING
ALLOYS
ANNEALING
CADMIUM SULFIDE SOLAR CELLS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER SULFIDES
CURRENTS
DATA
DIRECT ENERGY CONVERTERS
ELECTRIC CURRENTS
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
FILL FACTORS
FILMS
HEAT TREATMENTS
HEATING
HYDROGEN
INFORMATION
ION IMPLANTATION
LASER-RADIATION HEATING
MAGNESIUM ADDITIONS
MAGNESIUM ALLOYS
NONMETALS
NUMERICAL DATA
PHOTOCURRENTS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PLASMA HEATING
SOLAR CELLS
SOLAR EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRAPS