An approach for the higher efficiency in the hit cells

The highest conversion efficiency to date of 21.5% (confirmed by AIST) with a size of 100.3 cm(2) has been achieved in an HIT cell. Because of this high efficiency and the cell's superior temperature characteristics, HIT cells are highly regarded by consumers. Sanyo will increase the production volume of cells and modules to meet the demand both inside and outside of Japan. We have been investigating suitable materials based on Sanyo's technology for fabricating high-quality a-Si solar cells to obtain higher build-in potential and control the junction properties, and have been studying how to treat the surface to create a good interface without introducing any damage. We will continue our efforts to obtain even higher levels of conversion efficiency by using the high potential that this structure has.