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Single crystal Silicon has been produced using a cast-in-place process usually used for multicrystalline ingot production. This Mono2 TM material produces higher cell efficiencies compared to multi crystalline silicon material with the same average minority carrier lifetime. Profiles of lifetime through the height of the brick and across the ingot demonstrate rough equivalency in bulk lifetime between...
This paper presents an overview of significant crystallisation results obtained with purified metallurgical grade silicon in the framework of the French Photosil project. Especially we show that in case of a high boron concentration in the feedstock (>2.1017 cm-3), the higher the compensation level is, the higher the solar cells efficiency will be. Several ingots were crystallised with different...
We analyse the effect of individual process steps on the material quality of mc-Si wafers. In addition to the commonly used recombination lifetime, we measure material parameters such as the concentration of interstitial oxygen, and of FeB. We show that such additional variables in the analysis can give much more information and insight into the effect of individual process steps. We have processed...
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