Investigation of photovoltaic mechanisms in polycrystalline thin-film solar cells. Interim technical report, November 1, 1980-July 31, 1981

Technical Report · Fri Mar 05 04:00:00 EST 1982

DOI:https://doi.org/10.2172/5356231· OSTI ID:5356231

Temofonte, T. A.; Szedon, J. R.; Keeffe, T. W.

Effort is reported on measurement technique development to assess the utility of Deep-Level Transient Spectroscopy (DLTS) methods in characterizing polycrystalline silicon that was deliberately doped with Ti during growth. Difficulties encountered with lateral DLTS measurements are discussed. In this approach, modulation of the grain boundary, double-depletion region produces the entire DLTS signal. Major effort has been applied in grain boundary characterization and control. The most significant accomplishments to date have involved laser scanning of slices of Wacker SILSO polysilicon having nearly identical grain structure. By using various kinds of treatments and by comparing treated and untreated substrates having nearly identical grain structure, control of grain boundary photocurrent suppression (..delta..I/sub ph/) over the range 1% less than or equal to ..delta..I/sub ph/ less than or equal to 40% was demonstrated.

• Research Organization: Solar Energy Research Inst., Golden, CO (USA); Westinghouse Research and Development Center, Pittsburgh, PA (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-77CH00178
• OSTI ID: 5356231
• Report Number(s): SERI/PR-9233-1-T2; ON: DE82013338
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
AUGER ELECTRON SPECTROSCOPY
CHALCOGENIDES
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
DIRECT ENERGY CONVERTERS
DOPED MATERIALS
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC EQUIPMENT
ELEMENTS
ELLIPSOMETRY
EQUIPMENT
GRAIN BOUNDARIES
LASER RADIATION
MATERIALS
MEASURING METHODS
METALS
MICROSTRUCTURE
OPTICAL EQUIPMENT
OPTICAL SCANNERS
OXIDES
OXYGEN COMPOUNDS
PASSIVATION
PHOTOCURRENTS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
POLYCRYSTALS
RADIATIONS
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
SPECTROSCOPY
TITANIUM
TRANSITION ELEMENTS
TRAPS