Properties of liquid phase crystallized interdigitated back-contact solar cells on glass

摘要

We fabricated interdigitated back-contact silicon hetero-junction solar cells based on thin-film absorbers on glass. The Si absorbers were directly deposited on the glass and crystallized using liquid phase crystallization. To compare whether our contact system is applicable to a wide range of initial absorber conditions two different types of precursors were prepared with absorber thicknesses between 2.5-9 um. Furthermore, glass superstates, doping densities and interlayer stacks were varied. With a KOH random pyramid light trapping texture at the back more than 30 mA/cm~2 were achieved on an electron beam evaporated precursor material and 655 mV on a PECVD precursor material.