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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Solar cell submodules with bus bars that leave tabs along one end of the submodule and wires with raised portions along the other end are assembled by interlocking the tabs and wires of adjacent submodules. This structural design is lightweight and reliable and requires no metallic substructure.
Operation of solar cell arrays in dilute streaming plasmas
Fabrication of cadmium sulfide thin film solar cell modules
Radiation effects in lithium-doped silicon solar cells
Radiation effects on lithium p on n solar cells
Solar cell radiation damage during 416.8 days in synchronous orbit on satellite ATS 1, discussing radiation shields
Spectral response of silicon solar cells at low temperature
Optimized silicon solar cells for space exploration power systems
Modifying existing solar cells for temperature control
Feasibility of using radiation resistant solar cell cover glass to replace fused quartz
Acoustic field effects on gallium arsenide, silicon solar cells, and photoresistive devices with and without light exposure
High altitude balloon flights for solar cell calibration
Teflon FEP investigated as cover for silicon solar cells including process for heat sealing
Si solar cell radiation resistance improvement through Li doping, noting efficiencies in excess of state-of-art N/P cells after exposure to 1 MeV electrons
The phenomenon of high-resistivity silicon solar cells manifesting high open-circuit voltages previously observed only for cells made from low-resistivity silicon is shown to be caused by the presence of a shallow diffused region at the back surface of the cell. The basic cell structure is either n+, p, p+ or p+, n, n+. The high open-circuit voltage arises from the injection and accumulation of excess majority carriers in the bulk upon illumination or application of forward bias to the structure. A working model for the cell, designated a back surface field (BSF) cell, is described, and recent developments are cited.
Silicon monoxide (SiO) coated silicon solar cells covered with fluorinated ethylene-propylene-A (FEP-A) were irradiated by 1-MeV electrons in vacuum. The effect of irradiation on the light transmittance of FEP-A was checked by measuring the short-circuit current of the cells while in vacuum after each dose increment, immediately after the irradiation, and again after a minimum elapsed time of 16 hr. The results indicated no apparent loss in transmission due to irradiation of FEP-A and no delamination from the SiO surface while the cells were in vacuum, but embrittlement of FEP-A occurred at the accumulated dose.
Growth and fabrication procedures for the baseline solar cells are described along with measured cell parameters, and the results. Reproducibility of these results was established and the direction to be taken for higher efficiency is identified.