Tungsten Target in Solar Cell Coating
What is solar cell?
Solar cells, also called photovoltaic cells or solar chip, is a kind of photovoltaic semiconductor slice, which can make use of solar energy directly to generate electricity. It can output voltage at the moment of illumination, and it will produce current in the case of the circuit conditions.
What are the solar cell types?
According to its crystalline state, it can be divided into: (1) crystalline-based (single-crystalline, polycrystalline form) (2) amorphous- based (a-)
According to its different materials, it can be divided into: (1) silicon solar cells (2) polycrystalline film (3) organic polymer (4) nano-crystals and the like.
The coating materials are different from each other in accordance with the classification of the solar cell. The common used coating materials in solar cells are tungsten (W), silicon (Si), titanium (Ti), molybdenum (Mo), aluminum (Al), silver (Ag) , chromium (Cr), copper (Cu), zinc oxide (ZnO), silica-alumina (Si: Al) and the like.
Why tungsten target can be applied in solar cell coating?
Because tungsten target applied in the solar cell can improve solar cell’s optical performance and conversion efficiency.
Because fossil fuel resources are dwindling, people gradually turn their eyes to solar energy, which is mainly turning light (from the sun light) into electricity and heat.
Today, solar cells have been developed to the third generation (thin-film solar cells), and sputter coating process is become a preferred preparation method. With the rise and rapid development of the global low carbon economy, target materials for solar cells coating has become the focus of worldwide target suppliers. Solar coating shows explosive growth, the data showing that the installing number of solar cells’ annual rates from 2005 to 2007 is: 23%, 40%, 67%, which means that there are a lot of people gradually pursuing for higher-quality solar cells, in view of tungsten is a kind of environment friendly sputtering material, harmless to people, apply tungsten target in solar cell coating will become a new industry.
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