Case Study: PL+IV Synchronized Testing Accelerates TOPCon Solar‑Cell R&D Progress

 

Project Background

One PV enterprise’s R&D lab was developing new TOPCon solar‑cell prototypes. Their old setup used standalone PL imager and separate IV tester.

Existing pain‑points:

1. They needed manually transfer sample cell between two devices, repeated clamping operation.
2. PL defect images and IV electrical test records could not be automatically matched. Engineers spent long time manually associating picture and performance data.
3. Hard to directly verify whether observed micro‑cracks & crystal defects lead to actual electrical‑efficiency loss.
4. Slow testing cycle, low efficiency for trial‑batch evaluation.

Solution: Deploy Yoha‑006_C‑PLIV PL+IV all‑in‑one tester from Yoha Solar

The lab adopted integrated PL+IV test unit. One‑step operation gets both high‑resolution PL defect image and complete IV curve & cell parameters.

Key onsite benefits:

1. Synchronized measurement, no repeated cell‑loading; one‑cell total test duration within 20 seconds.
2. System automatically links PL defect image with corresponding Isc, Voc, FF, conversion‑efficiency data. Engineers can directly analyze correlation between internal crystal defects and power‑performance drop.
3. Built‑in AI engine auto‑identifies micro‑cracks, sintering anomalies, printing defects. Reduce subjective manual judgement error.
4. All test records can export as PDF / Excel for experiment archiving.

Measurable business outcome

• R&D testing workflow efficiency improved by 70 %.
• Researchers quickly located several critical process‑induced crystal‑defect sources.
• Final prototype cell yield lifted from 62 % up to 90 %.
• Overall new‑product R&D iteration cycle shortened by 40 %.

Summary

For new‑generation cell R&D such as TOPCon, HJT and IBC, synchronized PL+IV testing offers direct correlation between internal micro‑defect and electrical performance. It is far more powerful than separate single‑mode test equipment.

More product info：https://www.whyoha.com/product/solarcell/167.html

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