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1 September 2009


BioSolar files patent for thin-film PV module bio-backsheet

BioSolar Inc of Santa Clarita, CA, USA, which is developing technology to produce bio-based materials from renewable plant sources that cut photovoltaic module costs, has filed a patent application relating to its proprietary BioBacksheet-A, a bio-based backsheet featuring an absolute moisture barrier for the thin-film photovoltaic cell market.

BioBacksheet-A is a unique three-layer laminate film consisting of a 100%-recyclable aluminum foil center core sandwiched between two outer layers of bio-based polymer films.

“BioSolar's goal is to reduce the costs of solar modules and make solar energy greener by replacing petroleum-based module components with bio-based materials made from renewable plant sources,” says CEO Dr David Lee. “Patent filing and protection of our intellectual property is an important milestone as we continue our journey toward full-scale commercial production for many of the company’s new products.”

BioSolar is aiming to develop a backsheet with a water vapor transmission rate of essentially zero, which is necessary for thin-film solar module components such as cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS). The initial pilot line run of this backsheet was a success, says the firm. Testing of these samples is continuing as the firm moves toward commercialization.

BioSolar says that its complete line of backsheets meet or exceed the characteristics of various testing and performance standards for the photovoltaic industry and are expected to cost significantly less than petroleum-based films currently in use by most solar module manufacturers.

See related item:

BioSolar expands BioBacksheet range to thin-film PVs

Search: Thin-film PV CIGS CdTe