Development of Polyolefin Encapsulants for Silicon Photovoltaic Solar Cells by DNP

July 13, 2010 · Filed Under Clean Tech, Green Tech 

Encapsulants are critical building component of PV modules, come as a sheet material responsible for protecting PV cells and collectors circuits from external environment, requiring these materials to have a high level of weather resistance and prolong reliability.
Due to high cost of PV solar cells, there has been a recent tendency to thin down the crystal silicon, however, thin silicon has the tendency to break or crack, leaving manufacturer with alternative of thickening the encapsulants.
Based on this, Dai Nippon Printing has successfully developed a CVF1, polyolefin encapsulants, which is suitable to be used within crystalline silicon photovoltaic (PV) cells.
The new product displays a superb water vapor barrier qualities as well as chemical stability where it does not emit acidic gas. Furthermore, the new product offers a superior transparency and flexibility throughout a broad thermal scope from low to high temperatures, while exhibiting a thermal resistance. DNP is currently working to expand the application of the new product from thin film solar batteries to crystalline silicon PV modules. The shelf life of the newly developed encapsulants if left unopened is 18 month at room temperature, which is 3 times the viable storage period of EVA. Furthermore, the new product offers ten times water vapor barrier qualities of EVA, where they are protected from those water vapors that cause the reduction of solar cell functions. The company planning for sales of 5 billion JPY in 2013.

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