LBIC for Cells and Modules


Tau Science’s innovative Rapid Scan LBIC™ system modernizes the traditional technique of Laser Beam Induced Current.  Megapixel images may be acquired in less than twenty minutes to study micron-scale defects in solar cells over a broad range of spot-size, injection ratio and beam intensity, and the system may be configured with several measurement options.

Wavelengths: Up to sixteen lasers [355-1625nm] may be ordered to provide full-spectrum coverage and calculate Jsc maps in realtime.

Reflectance:  An integrating sphere allows simultaneous measurement of Reflectance, EQE and IQE.

Beam Tilt: A goniometer arm may be used to adjust the angle of incidence from 0-45 degrees.  This is useful to study the angle-dependent scattering of light from both cells and modules.

Auto-spotsize and intensity: the engineer specifies beam spotsize and intensity, and Tau's autocalibration adjusts the beam automatically before starting the scan.

Light Bias: Various wavelengths are available to fill surface and bulk traps, as well as provide cell bias during multijunction measurements.

3D maps are displayed in the LBIC GUI, and tunable spotsize and intensity allow the user to explore various aspects of recombination.  For instance, the researcher may work at 0.01 sun injection to study performance in low-light conditions, or they may increase the injection to >100 suns to sharpen the image beyond the diffusion length limit and study the shape of physical defects.  Reference diodes are included for automated spotsize and intensity measurements, and the stage size can be scaled to meet the customer requirements on both cells and modules.

Please contact Tau Science or an authorized Distributor to discuss your system requirements.