PIDcon bifacial
PIDcon bifacial: for quality control of bifacial PERC/PERC+ solar cells, HIT, Topcon, c-Si solar cells, mini modules and more
Obstacle
The change to a light capping rear side of the cells, was found to make bifacial PERC cells and modules sensitive to new types of PID at the rear side, namely PID of the de-polarization type (PID-p) and a corrosive PID mechanism (PID-c).
Solution
In order to test cells for these kinds of PID, the PIDcon bifacial was developed. It is stressing the complete cell with temperature, illumination and high voltage, which can be polarized in both directions. By measuring the IV curve under illumination the PID sensitivity can be determined.
Applications
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PID detection at cell level
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Research, Production & Quality Control of PERC, AL-BSF, PERC+, bifacial PERC, PERT, PERL and IBC solar cells
- Video Session of 10th Silicon PV by K. Sporleder from Fraunhofer CSP, Germany
Highlights
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Measurements of cells
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Test duration: 4 hours (typical)
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Ability to measure PERC, AL-BSF, PERC+, bifacial PERC, PERT, PERL and IBC solar cells
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Voltage: ± 1.5 kV
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No climate chamber necessary
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Easy to use bench top device
PIDcon bifacial
| Type | Stress | Recovery |
| PID-s front | 85 °C, +1.5 kV | 85 °C, -1.5 kV |
| PID-p rear | 85 °C, +1.5 kV, without illumination | 85 °C, dark storage or illumination |
| PID-c rear | 85 °C, +1.5 kV, with illumination | Not possible |
| Lamination | 150 °C, 20 min |
| Sample size | up to 210 x 210 mm |
| Suitable for |
For PERC, AL-BSF, IBC, PERC+, bifacial PERC |
| Measurement of |
Measurement of: Rparallel, leakage current, IV curve under illumination |
