Effects of lithium counterdoping on radiation damage and annealing in n(+)p silicon solar cells

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6382938

Weinberg, I; Brandhorst, Jr, H W

Boron-doped silicon n(+)p solar cells were counterdoped with lithium by ion implantation and the resultant n(+)p cells irradiated by 1 MeV electrons. Performance parameters were determined as a function of fluence and a deep level transient spectroscopy (DLTS) study was conducted. The lithium counterdoped cells exhibited significantly increased radiation resistance when compared to boron doped control cells. Isochronal annealing studies of cell performance indicate that significant annealing occurs at 100 C. Isochronal annealing of the deep level defects showed a correlation between a single defect at E sub v + 0.43 eV and the annealing behavior of short circuit current in the counterdoped cells. The annealing behavior was controlled by dissociation and recombination of this defect. The DLTS studies showed that counterdoping with lithium eliminated three deep level defects and resulted in three new defects. The increased radiation resistance of the counterdoped cells is due to the interaction of lithium with oxygen, single vacancies and divacancies. The lithium-oxygen interaction is the most effective in contributing to the increased radiation resistance.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 6382938
• Report Number(s): N-84-31513; NASA-TM-83755; E-2243; CONF-8409185-1
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ADDITIVES
ALKALI METALS
ANNEALING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIRECT ENERGY CONVERTERS
DOPED MATERIALS
ELEMENTS
EQUIPMENT
HEAT TREATMENTS
INTERSTITIALS
LITHIUM
MATERIALS
METALS
NONMETALS
OXYGEN
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
RADIATION EFFECTS
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT