Theory of beam induced current characterization of grain boundaries in polycrystalline solar cells
Journal Article
·
· J. Appl. Phys.; (United States)
A theoretical analysis is given of the induced current profiles at grain boundaries in polycrystalline solar cells, as obtained by light or electron beam excitation. The area A and the variance sigma/sup 2/ of the contrast profile of a grain boundary are calculated for realistic generations as functions of the interface recombination velocity v/sub s/ and the minority carrier diffusion length L. A graphical new procedure is proposed which allows the simultaneous determination of v/sub s/ and L from the measured values of A and sigma. The evaluation of an experimental electron beam induced current profile illustrates the applicability of the theory.
- Research Organization:
- CNR-Istituto LAMEL, Via Castagnoli 1, 40126 Bologna, Italy
- OSTI ID:
- 6347302
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 54:3; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
BEAMS
CHARGE CARRIERS
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
DIFFUSION LENGTH
DIMENSIONS
DIRECT ENERGY CONVERTERS
DISTRIBUTION
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITATION
GRAIN BOUNDARIES
INTERFACES
LENGTH
LEPTON BEAMS
MATHEMATICAL MODELS
MICROSTRUCTURE
PARTICLE BEAMS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
POLYCRYSTALS
RADIATIONS
RECOMBINATION
SIZE
SOLAR CELLS
SOLAR EQUIPMENT
SPATIAL DISTRIBUTION
VISIBLE RADIATION
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
BEAMS
CHARGE CARRIERS
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
DIFFUSION LENGTH
DIMENSIONS
DIRECT ENERGY CONVERTERS
DISTRIBUTION
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITATION
GRAIN BOUNDARIES
INTERFACES
LENGTH
LEPTON BEAMS
MATHEMATICAL MODELS
MICROSTRUCTURE
PARTICLE BEAMS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
POLYCRYSTALS
RADIATIONS
RECOMBINATION
SIZE
SOLAR CELLS
SOLAR EQUIPMENT
SPATIAL DISTRIBUTION
VISIBLE RADIATION