ISFH CalTeC: Solar cells
The solar cell calibration laboratory specializes in the precise measurement and calibration of silicon solar cells—ranging from small laboratory cells (10×10 mm²) to large-area industrial solar cells with edge lengths of up to 210 mm.
Scope of calibration services
We offer accredited measurements of the key electrical characteristics of solar cells:
- Cell or aperture area (A)
- Spectral Responsivity (SR)
- Current-voltage (I-V) characteristics, including:
- Short-circuit current (Isc)
- Open-circuit voltage (Voc)
- Fill factor (FF)
- Efficiency (η)
- Temperature coefficients:
- α (for Isc), β (for (Voc), δ (for Pmax)
All values are provided with corresponding measurement uncertainty. To ensure traceability to SI units, primary standards used in our lab are calibrated by Germany’s national metrology institute, PTB (Physikalisch-Technische Bundesanstalt).
Cell formats & types
We specialize in the calibration of wafer-based silicon solar cells, from lab-sized samples to industrial full-size cells:
- Laboratory solar cells on wafers
- Multi-busbar (mBB) cells with busbar spacing ≥ 10 mm
- Busbarless (BB0) solar cells
- Back-contact (BC) solar cells
Our contact systems are tailored to these cell types and ensure precise, repeatable measurements.
Confirmation of world records
ISFH CalTeC is a recognized calibration laboratory for the certification of efficiency world records, which are published in the:
- “Progress in Photovoltaics” efficiency tables (Wiley)
- Energy Efficiency Charts by NREL (https://www.nrel.gov/pv/cell-efficiency)
These listings include the highest independently verified efficiencies for solar cells and modules worldwide.
Interested in calibrations?
Get in touch with us for:
• Calibration of individual solar cells
• Measurement services for development projects
• Support with certifications and world record validations
Contact
Dr. Karsten Bothe
Downloads
Flyer
PDF, 777.6 KBMeasuring procedure
PDF, 1.30 MBContacting multibusbar solar cells
PDF, 419.83 KB
