Removal of Light-induced Degradation in Crystalline Silicon

Aalto University Background
State of the art solar cells made of Czochralski or high quality multicrystalline silicon suffer from light-induced degradation (LID), meaning that their conversion efficiency decreases dramatically when the cells are placed under sunlight. Tradeoffs are currently needed to minimize this harmful effect.
Technology Overview
Using this technology no such tradeoffs are needed. Aalto researchers provide a method for the complete removal of LID that can be easily integrated with any solar cell manufacturing line at almost no extra cost.

Stage of Development
Method is tested and verified both in laboratory and pilot Solar Cell manufacturing line.

Up to 15% enhancement in yield of solar cell manufacturing
Simplified manufacturing process
Reduces material costs
Allows high boron and oxygen
concentration without loss in stable efficiency


CZ-Si solar cells
Multicrystalline Si solar cells

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