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Title: Optical-diffraction method for determining crystal orientation

Abstract

Disclosed is an optical diffraction technique for characterizing the three-dimensional orientation of a crystal sample. An arbitrary surface of the crystal sample is texture etched so as to generate a pseudo-periodic diffraction grating on the surface. A laser light beam is then directed onto the etched surface, and the reflected light forms a farfield diffraction pattern in reflection. Parameters of the diffraction pattern, such as the geometry and angular dispersion of the diffracted beam are then related to grating shape of the etched surface which is in turn related to crystal orientation. This technique may be used for examining polycrystalline silicon for use in solar cells.

Inventors:
Issue Date:
OSTI Identifier:
6350664
Application Number:
ON: DE83010479
Assignee:
EDB-83-074127
DOE Contract Number:  
AC02-77CH00178
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; CRYSTALS; GRAIN ORIENTATION; MEASURING METHODS; SILICON SOLAR CELLS; INSPECTION; CRYSTAL DEFECTS; DIFFRACTION; DISLOCATIONS; GRATINGS; LASER RADIATION; LASERS; POLYCRYSTALS; SILICON; COHERENT SCATTERING; CRYSTAL STRUCTURE; DIRECT ENERGY CONVERTERS; ELECTROMAGNETIC RADIATION; ELEMENTS; EQUIPMENT; LINE DEFECTS; MICROSTRUCTURE; ORIENTATION; PHOTOELECTRIC CELLS; PHOTOVOLTAIC CELLS; RADIATIONS; SCATTERING; SEMIMETALS; SOLAR CELLS; SOLAR EQUIPMENT; 140501* - Solar Energy Conversion- Photovoltaic Conversion

Citation Formats

Sopori, B.L. Optical-diffraction method for determining crystal orientation. United States: N. p., 1982. Web.
Sopori, B.L. Optical-diffraction method for determining crystal orientation. United States.
Sopori, B.L. Fri . "Optical-diffraction method for determining crystal orientation". United States.
@article{osti_6350664,
title = {Optical-diffraction method for determining crystal orientation},
author = {Sopori, B.L.},
abstractNote = {Disclosed is an optical diffraction technique for characterizing the three-dimensional orientation of a crystal sample. An arbitrary surface of the crystal sample is texture etched so as to generate a pseudo-periodic diffraction grating on the surface. A laser light beam is then directed onto the etched surface, and the reflected light forms a farfield diffraction pattern in reflection. Parameters of the diffraction pattern, such as the geometry and angular dispersion of the diffracted beam are then related to grating shape of the etched surface which is in turn related to crystal orientation. This technique may be used for examining polycrystalline silicon for use in solar cells.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {5}
}