Detail publikace

Simulation Program For Defect Analysis

Originální název

Simulation Program For Defect Analysis

Anglický název

Simulation Program For Defect Analysis

Jazyk

en

Originální abstrakt

ABSTRACT: For detection of local defects in solar cells LBIC (Light Beam Induced Current) is a widely used universal method. The resulting picture indicates differences in local series and shunt resistances and differences in local rate of minority carriers recombination. A laser beam scanning over the solar cell surface is routinely used in this test. This process may take several hours depending on demanded picture resolution. A method for fast scanning of solar cells based on the LBIC measurement was proposed and tested. Instead of laser beam a linear light source consistent of multiple SMD LED diodes is used. Scanning is performed in both X and Y axes. In principle one scan in each coordinate is sufficient. The resulting current response is influenced by all defects allocated in the actual position of the actuating light beam line. The picture of the solar cell defects is computed combining the contributions from each line in both X and Y axes. Result of this computation is not the same as the LBIC picture nevertheless it gives an information about the position and about the change of intensity of the local current. Data computation was made by MATLAB program. Using red, green and blue LEDs there is a possibility to obtain different depth of light absorption area. This way the faults in bulk so as near the surface of the solar cell can be detected.

Anglický abstrakt

ABSTRACT: For detection of local defects in solar cells LBIC (Light Beam Induced Current) is a widely used universal method. The resulting picture indicates differences in local series and shunt resistances and differences in local rate of minority carriers recombination. A laser beam scanning over the solar cell surface is routinely used in this test. This process may take several hours depending on demanded picture resolution. A method for fast scanning of solar cells based on the LBIC measurement was proposed and tested. Instead of laser beam a linear light source consistent of multiple SMD LED diodes is used. Scanning is performed in both X and Y axes. In principle one scan in each coordinate is sufficient. The resulting current response is influenced by all defects allocated in the actual position of the actuating light beam line. The picture of the solar cell defects is computed combining the contributions from each line in both X and Y axes. Result of this computation is not the same as the LBIC picture nevertheless it gives an information about the position and about the change of intensity of the local current. Data computation was made by MATLAB program. Using red, green and blue LEDs there is a possibility to obtain different depth of light absorption area. This way the faults in bulk so as near the surface of the solar cell can be detected.

BibTex


@inproceedings{BUT24408,
  author="Kristýna {Jandová} and Jiří {Vaněk} and Marcel {Janda} and Tomáš {Fořt} and Radim {Bařinka}",
  title="Simulation Program For Defect Analysis",
  annote="ABSTRACT: For detection of local defects in solar cells LBIC (Light Beam Induced
Current) is a widely used universal method. The resulting picture indicates differences
in local series and shunt resistances and differences in local rate of minority carriers
recombination. A laser beam scanning over the solar cell surface is routinely used in
this test. This process may take several hours depending on demanded picture
resolution. A method for fast scanning of solar cells based on the LBIC measurement
was proposed and tested. Instead of laser beam a linear light source consistent of
multiple SMD LED diodes is used. Scanning is performed in both X and Y axes. In
principle one scan in each coordinate is sufficient. The resulting current response is
influenced by all defects allocated in the actual position of the actuating light beam
line. The picture of the solar cell defects is computed combining the contributions from
each line in both X and Y axes. Result of this computation is not the same as the LBIC
picture nevertheless it gives an information about the position and about the change of
intensity of the local current. Data computation was made by MATLAB program. Using
red, green and blue LEDs there is a possibility to obtain different depth of light
absorption area. This way the faults in bulk so as near the surface of the solar cell can
be detected.",
  address="Brno University of Technology,",
  booktitle="WORKSHOP NDT 2006 NON-DESTRUCTIVE TESTING IN ENGINEERING PRACTICE",
  chapter="24408",
  institution="Brno University of Technology,",
  year="2006",
  month="november",
  pages="74",
  publisher="Brno University of Technology,",
  type="conference paper"
}