First, the province of materials, low cost.
The main raw materials for silicon-based thin-film batteries are glass and various gases (silanes, boranes, etc.). Amorphous silicon with a thickness of less than 1 μm absorbs sunlight, while conventional crystalline silicon technology uses nearly 200 μm thick crystals. The amount of silicon used is 1/100 of the ordinary crystalline silicon battery greatly reduces the material cost; and it is convenient to use glass, stainless steel and other low-cost raw materials as the substrate, which will not be limited by the shortage of raw materials; the process has a high degree of integration and is suitable for large-scale automated production. Will greatly reduce costs.
Second, low light and good power generation.
The design of the amorphous microcrystal lamination structure allows the spectral response to expand from visible light to the infrared region, and has a wider spectrum of spectral energy absorption than crystalline silicon, making the battery in a low-light environment or scattered light, yin, cloud, and rain conditions. It can also generate electricity. Depending on the difference in lighting conditions in the region, it can generate 5~17% more power than a crystalline silicon battery with the same power installed capacity.
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At the same time, the lamination design greatly improves the photoelectric conversion efficiency compared with the conventional amorphous silicon single-cell battery, which can reach about 10% internationally. The photovoltaic conversion efficiency of a new generation of amorphous/microcrystalline silicon laminated thin-film solar cells developed by photovoltaics using proprietary intellectual property rights has reached a level of 10% to 12%, which is a solar cell commercial with the highest photoelectric conversion efficiency in the world for similar products. product.
Third, high temperature adaptability.
Thin-film batteries also have lower temperature-resistant attenuation coefficients than crystalline silicon cells (half of that of crystalline silicon). Therefore, they are more suitable for application environment characteristics under harsh conditions in high-temperature, desert, and humid regions, exhibiting high temperature resistance and high resistance. Moist quality stability.
Fourth, the energy recovery period is short.
After the thin film solarization process of the solar cell is completed, the material preparation of the thin film cell and the formation of the cell are simultaneously performed, thereby saving many process steps, ensuring the quality stability and consistency, and greatly saving the expensive semiconductor material. At the same time, thin-film solar cells use low-temperature process technology, which is not only conducive to energy conservation and consumption reduction, but also facilitates the use of inexpensive substrates (glass, stainless steel, etc.). The thin-film battery has the shortest energy recovery period, about 1 year, and the crystalline silicon battery has 2.5 to 3 years.
V. Wide range of applications
Thin film solar cells can be made into different light transmittances according to their needs. Instead of glass curtain walls, they have a beautiful appearance, can generate electricity, and can block the entrance of external infrared rays and the dissipation of internal heat energy, and are basically not limited by the installation angle. Less affected by shadows. Due to the weak light effect and the weak installation angle, it is not only suitable for strong light, direct light, but also suitable for scattered light and reflected light. It has unmatched advantages over crystalline silicon in the application of Golden Sun demonstration project and optoelectronic building integration project. The potential and superiority.
In addition to the above characteristics, there are no shortages of raw materials (CIGS requires indium and scarce metals) and no toxic pollution (cadmium in CdTe is a toxic substance) and other defects, such as CIGS and CdTe compound thin-film solar cells. Therefore, although the conversion efficiency of silicon-based thin films is slightly lower than that of CIGS and CdTe, its manufacturing cost is low, and it is easy to operate. At present, the degree of industrialization is the highest.
