There are monocrystalline silicon polysilicon film passivation heterojunction double back, including monocrystalline silicon and polycrystalline silicon products for the mainstream, polycrystalline silicon and monocrystalline silicon technology is now on the market is very mature, this project from monocrystalline silicon and polycrystalline silicon, monocrystalline silicon with high efficiency, high prices, fragile not easy modification than the lower efficiency of single crystal silicon, polysilicon, prices didn't also monocrystalline silicon, have toughened, antireflection coating, easily modified