Silicon materials task of the low cost solar array project (Phase III). Effects of impurities and processing on silicon solar cells. Phase III summary and seventeenth quarterly report, Volume 2: analysis of impurity behavior

Technical Report · Wed Jan 23 04:00:00 EST 1980

DOI:https://doi.org/10.2172/5381070· OSTI ID:5381070

Hopkins, R H; Davis, J R; Rohatgi, A; Campbell, R B; Blais, P D; Rai-Choudhury, P; Stapleton, R E; Mollenkopf, H C; McCormick, J R

The object of this phase of the program has been to investigate the effects of various processes, metal contaminants and contaminant-process interactions on the properties of silicon and on the performance of terrestrial silicon solar cells. The study encompassed topics including thermochemical (gettering) treatments, base doping concentration, base doping type (n vs. p), grain boundary-impurity interaction, non-uniformity of impurity distribution, long term effects of impurities, as well as synergic and complexing phenomena. The program approach consists in: (1) the growth of doubly and multiply-doped silicon single crystals containing a baseline boron or phosphorus dopant and specific impurities which produce deep levels in the forbidden band gap; (2) assessment of these crystals by chemical, microstructural, electrical and solar cell tests; (3) correlation of the impurity type and concentration with crystal quality and device performance; and (4) delineation of the role of impurities and processing on subsequent silicon solar cell performance. The overall results reported are based on the assessment of nearly 200 silicon ingots. (WHK)

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
• DOE Contract Number: NAS-7-100-954331
• OSTI ID: 5381070
• Report Number(s): DOE/JPL/954331-80/9(Vol.2)
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
AGING
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
CRYSTALS
DATA
DATA FORMS
DIFFUSION LENGTH
DIRECT ENERGY CONVERTERS
DISTRIBUTION
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
GETTERING
GETTERS
GRAIN BOUNDARIES
GRAPHS
IMPURITIES
INFORMATION
ISOLATED VALUES
MATERIALS
MATHEMATICAL MODELS
MICROSTRUCTURE
MONOCRYSTALS
N-TYPE CONDUCTORS
NUMERICAL DATA
P-TYPE CONDUCTORS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
POLYCRYSTALS
PROCESSING
RESEARCH PROGRAMS
SEMICONDUCTOR MATERIALS
SEMIMETALS
SILICON
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
SPATIAL DISTRIBUTION