Organic photovoltaic devices comprising fullerenes and derivatives thereof
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United States of America Patent
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Nov 25, 2014
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Apr 10, 2013
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Jun 13, 2006
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Abstract
Photovoltaic cells comprising an active layer comprising, as p-type material, conjugated polymers such as polythiophene and regioregular polythiophene, and as n-type material at least one fullerene derivative. The fullerene derivative can be C60, C70, or C84. The fullerene also can be functionalized with indene groups. Improved efficiency can be achieved.
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