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Title: Local response of ITO/polysilicon solar cells

Abstract

Scanning light spot (SLS) and electron beam induced current (EBIC) techniques have been used to study the local response of ITO/polysilicon solar cells. The SLS and EBIC techniques were applied to polycrystalline solar cells in conjunction with etch pit studies in order to determine the causes of the local variation in cell response. It was found that the minority carrier diffusion length does not significantly effect the response around dislocations and grain boundaries. ITO/polysilicon cell fabricated with cast and zone refined polysilicon substrates were investigated. It is shown that the two materials have significantly different properties. The most important difference is the density and electrical activity of the grain boundaries and dislocations. In contrast to the zone refined polysilicon in which most or all of the grain boundaries and dislocation are active recombination centers, the costpolysilicon has few active centers. It is concluded that the intragrain defects reduce the cell current response as well as grain boundaries and sometimes reduce the output more than grain boundaries.

Authors:
Publication Date:
OSTI Identifier:
5538027
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; SILICON SOLAR CELLS; ELECTRICAL PROPERTIES; PHYSICAL PROPERTIES; CAST METHOD; COMPARATIVE EVALUATIONS; DIFFUSION LENGTH; ELECTRIC CURRENTS; ELECTRON BEAMS; GRAIN BOUNDARIES; INDIUM OXIDES; MEASURING METHODS; POLYCRYSTALS; TIN OXIDES; ZONE REFINING; BEAMS; CHALCOGENIDES; CRYSTAL GROWTH METHODS; CRYSTAL STRUCTURE; CRYSTALS; CURRENTS; DIMENSIONS; DIRECT ENERGY CONVERTERS; EQUIPMENT; INDIUM COMPOUNDS; LENGTH; LEPTON BEAMS; MICROSTRUCTURE; OXIDES; OXYGEN COMPOUNDS; PARTICLE BEAMS; PHOTOELECTRIC CELLS; PHOTOVOLTAIC CELLS; PROCESSING; REFINING; SEPARATION PROCESSES; SOLAR CELLS; SOLAR EQUIPMENT; TIN COMPOUNDS; 140501* - Solar Energy Conversion- Photovoltaic Conversion

Citation Formats

Inoue, N. Local response of ITO/polysilicon solar cells. United States: N. p., 1980. Web.
Inoue, N. Local response of ITO/polysilicon solar cells. United States.
Inoue, N. Tue . "Local response of ITO/polysilicon solar cells". United States.
@article{osti_5538027,
title = {Local response of ITO/polysilicon solar cells},
author = {Inoue, N},
abstractNote = {Scanning light spot (SLS) and electron beam induced current (EBIC) techniques have been used to study the local response of ITO/polysilicon solar cells. The SLS and EBIC techniques were applied to polycrystalline solar cells in conjunction with etch pit studies in order to determine the causes of the local variation in cell response. It was found that the minority carrier diffusion length does not significantly effect the response around dislocations and grain boundaries. ITO/polysilicon cell fabricated with cast and zone refined polysilicon substrates were investigated. It is shown that the two materials have significantly different properties. The most important difference is the density and electrical activity of the grain boundaries and dislocations. In contrast to the zone refined polysilicon in which most or all of the grain boundaries and dislocation are active recombination centers, the costpolysilicon has few active centers. It is concluded that the intragrain defects reduce the cell current response as well as grain boundaries and sometimes reduce the output more than grain boundaries.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Thesis/Dissertation:
Other availability
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