Dai Nippon Printing Co., Ltd. (DNP) has revealed a new solar cell backseat with extremely high water-vapor barrier property.
With this solar cell backseat, the solar cell manufacturing field has entered a post-aluminum foil era.
No aluminum foil is used. The price is low. Water-vapor barrier property: 0.01g/cm2・day. The price: comparable with that of the previous aluminum-foil based backseat.
The sample shipping of the new backseat will start soon. 500 million Yen (target sales amount) will be reached in 2012.
A new converting process, developed anew, enables the formation of the new backseat. The converting process uses a non-oxide vapor deposited film having high water-vapor barrier property and an adhesive having high weather resistance
As known, use of the aluminum foil for the solar cell backseat is a common practice particularly in the thin film solar cell and the crystal solar cell because high water-vapor barrier property is essentially required for the solar cells. The process to electrically insulate the ends of the aluminum foil is also essential to eliminate a chance of electrical contact of the aluminum foil with the wires led from the solar cell. This is a serious workload.
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