A tandem-type panel consists of different kinds of solar cells and can convert light in a wider wavelength range to electricity. The exhibited tandem-type panels were composed of amorphous silicon and microcrystalline silicon and expected to be used for industrial photovoltaic systems. A number of "tandem-type" amorphous silicon thin film solar panels were exhibited at PV Japan 2009, an exhibition of photovoltaic technologies that is running from June 24 to 26, 2009, at Makuhari Messe in Chiba Prefecture, Japan.
AMAT showed off a tandem-type thin film solar panel using an 8.5-generation, 5.7m2 glass plate. Ulvac announced the "CIM-1400," plasma CVD equipment for tandem-type solar panels as the existing production line for thin-film solar cells enables the line to manufacture tandem-type panels. Oerlikon Solar announced a tandem-type panel with a conversion efficiency of 11%. And finally, Sharp, displayed a tandem-type thin film solar panel that is 1,409 x1,009mm in size. It features a module conversion efficiency of 9% and a power generation capacity of 128W.
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