From the photoelectric conversion efficiency of solar battery of view, now the mainstream crystalline silicon solar battery “has been approaching the theoretical limit.” Crystalline silicon solar battery is about the theoretical conversion efficiency of 29%. Its biggest determining factor is the intrinsic band gap of crystalline silicon. Because the wavelength of Toshiba Qosmio F55 battery light used to generate electricity is limited, so efficiency will be curbed. To further enhance efficiency, we need to adopt a new alternative to crystalline silicon materials or quantum effects such as absorption of new technologies to expand the scope of a breakthrough “Si theoretical limit.” The goal is to exceed 40%. For the new target, the development of solar battery are about to enter a new era.

The ultimate realization of the process of solar battery is now mainstream crystalline silicon solar battery have been close to theoretical conversion efficiency.

Crystalline silicon solar cell conversion efficiency to enhance the limit of the fastest coming in around 2015. As a crystalline silicon solar battery to form amorphous silicon layer table “HIT (Heterojunction with Intrinsic Thin layer) solar battery,” the exclusive manufacturer Sanyo Electric in May 2009 in the study achieved a 23% unit conversion efficiency. The company said it was the practical size of 10cm square solar battery a world record. In accordance with the general view, crystalline silicon solar cell conversion efficiency is about 29% of theoretical, and practical maximum value of 25 ~ 26%, can be seen, with the highest value of the Toshiba Qosmio F50 battery distance only a small few percentage points.