>20% efficient 80 µm thin industrial-type large-area solar cells from 100 µm Sawn c-Si Wafers

Reducing the thickness of crystalline Si wafers to be processed into solar cells yields several significant benefits: PV module manufacturing cost can be reduced and the required diffusion length of minority carriers is smaller. The latter in turn enables a higher efficiency potential and a larger spread of Si materials to be employed for rear junction solar cell concepts which are advantageous for n-type devices. Industrial-type 80 µm thin large-area rear junction solar cells manufactured from 100 µm wire-sawn wafers exhibit an independently certified efficiency of 20.1% with VOC of 672 mV.