Sanyo has just announced that it has broken its own world record for crystalline silicon solar cell efficiency, with its new cells achieving an efficiency of 23%. On top of that, Sanyo also claims that its new process will lower the production cost of its solar cells, reduce the amount of silicon used in the production of their cells, and make their cells more affordable.
Sanyo says that they made a number of improvements to their cells, which they call Heterojunction with Intrinsic Thin layer, or HIT, cells. The HIT cells use a single thin crystalline silicon wafer, surrounded by ultra-thin amorphous silicon layers. They also use a lower resistance electrode material, which reduces resistance loss when electric current flows through the electrode.