Electro-luminescence image of poly-crystalline silicon solar cell showing defect fingers and micro cracks. (coolSamBa HR-400)
Micro crack as seen in electro-luminescence image in poly-crystalline silicon solar cell (coolSamBa HR-400)
Finger-defect as seen in electro-luminescence image in poly-crystalline silicon solar cell (coolSamBa HR-400)
Photovoltaic Imaging of Solar Cells and Modules
Defects in solar cells drastically decrease their efficiency and lifetime. Therefore, quality inspection and characterization of solar cells and solar modules with electroluminescence is critical in the photovoltaic industry.
The coolSamBa cameras from Sensovation have been specifically designed for low-light luminescence imaging applications. Equipped with sensitive, high-resolution, scientific grade Si-CCD sensors, 16-bit ADCs and powerful 4-stage Peltier thermo-electric cooling, coolSamBa cameras provide images of high signal to noise ratio in demanding applications such as luminescence imaging for solar cell characterization.
The coolSamBa HR-400 and the coolSamBa HR-830 are best suited for in-line as well as off-line production characterization of solar cells and modules. The optimally balanced combination of sensitivity, spatial resolution and fast image read- out allows electroluminescence imaging at a speed of 1 image/sec (full imaging cycle including integration and read-out time).
Photovoltaic Imaging Applications:
- Process control in solar cell manufacturing
- in-line and off-line characterization of solar cells and modules
- electro-luminescence imaging
- photo-luminescence imaging
- micro crack identification
- detection of disconnected fingers
- shunt detection
Features of coolSamBa Cameras:
- customized scientific grade CCD sensors
- excellent near IR sensitivity (1,000 – 1,100nm)
- very high spatial resolution ( up to 63µm on 156mm x 156mm cells )
- 4-stage TE cooling of CCD for ultra-low noise imaging
- 16 bit dynamic range
- proven in electroluminescence imaging in solar cell production
- most cost efficient
Cameras for Photovoltaic Imaging:
SamBa Ci is Sensovation's latest camera exclusively dedicated to the inspection of solar cells. SamBa Ci ("Ci" standing for "Cell Inspection") is optimized for high-throughput imaging during industrial solar cell manufacturing at an exceptional price / performance ratio.
The coolSamBa HR-830 is a 8.3 MPixel, extra-high resolution camera for detail- rich scientific and industrial imaging. It's most important application is the electroluminescence inspection of Modules in Photovoltaic Industries.
The coolSamBa HR-400 is a 4 MPixel, high resolution camera for detail- rich scientific and industrial imaging.
The coolSamBa HR-320 is used for "low-light" Applications, like luminescence imaging, at high resolution and long exposure times.
The coolSamBa HR-200 is a 2 MPixel, high resolution camera for scientific and industrial imaging with high dynamic range.
Electro-luminescence image of a complete solar module acquired with one shot with coolSamBa HR-830
