Technology

 

A new generation of solar modules
Flexcell manufactures light, thin and flexible PV cells, using a proprietary thin film coating technology developed in the laboratories of the Institute for Micro-Technology (“IMT”) at the University of Neuchâtel in Switzerland. With the aim to achieve significantly lower production costs, Flexcell has industrialised the process to deposit a single amorphous silicon layer on low cost plastic substrates.


Thin film solar cells
The high costs of crystalline silicon wafers led the industry to look at cheaper raw materials for the manufacturing of solar cells.
The most common materials used are amorphous silicon or polycrystalline materials like cadmium telluride (CdTe) and copper indium (gallium) diselenide (CIS or CIGS). These materials are all good light absorbers and therefore only need to be about 1 µm thick, hence material costs are significantly reduced. All of these materials are suitable for large area deposition and hence high volume manufacturing. The thin film semi-conductor layer can be deposited either onto coated glass, stainless steel or plastic substrates.

   

Amorphous silicon is the best developed of the thin film technologies
Although amorphous silicon cells are less efficient (4% to 8% stabilised module efficiency), they are potentially cheaper than crystalline silicon and other thin film technologies, because of their lower material costs and cheaper scalable manufacturing processes. Thin film technologies can offer particular design options for building integrated applications and have the potential to meet the BIPV product requirements.
 
News
Flexcell’s new factory

Flexcell is opening a new factory in 2008. Built at Yverdon-les-Bains (Switzerland), it will have an annual production capacity of 25MW.
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