Community of green energy, renewable power, electrical machinery, automation, process control...

According to the statistics, before October, 2009, there are about 50 companies, which are constructing , expanding, or preparing to construct the production line of multicrystalline (poly-crystalline) silicon in more than 20 provinces in China. The scale of the construction for multicrystalline (poly-crystalline) silicon is 50,000 tons to 100,000 tons.

Regarding the wind power, there are about 70 manufacturers of wind energy now for just several years in Chna. But in fact the demands for wind power in the market of China, the capacity of the first 3 manufacturers are enough fully. That means other 67 manufacturers can't find enough demands of the market for their wind power.

 

But this is not the most serious problem these companies of renewable energy face.

This biggest problem is off-grid (stand-alone) for these clean energy (solar power, wind energy).

One scientific discovery of the computer semiconductor industry also has great potential in the photovoltaic (PV) industry: thin-film technology.

The "thin film" term comes from the method used to deposit the film, not from the thinness of the film. Thin-film cells are deposited in very thin, consecutive layers of atoms, molecules, or ions. Thin-film cells have many advantages over their "thick-film" counterparts. For instance, they use much less material. The cell's active area is usually only 1 to 10 micrometers thick, whereas thick films typically are 100 to 300 micrometers thick.

Thin-film cells can also usually be manufactured in a large-area process, which can be an automated, continuous production process. Finally, they can be deposited on flexible substrate materials.

Thin-Film Cell Structure

Unlike most single-crystal solar cells, a typical thin-film device doesn't have a metal grid for the top electrical contact. Instead, thin-film solar cell uses a thin layer of a transparent conducting oxide, such as tin oxide. These oxides are highly transparent and conduct electricity very well. A separate antireflection coating might top off the device, unless the transparent conducting oxide serves that function.