Efficient polymer:polymer bulk heterojunction solar cells

An organic bulk heterojunction photovoltaic device based on a blend of two conjugated polymers, a polyphenylenevinylene as the electron donor and a red emitting polyfluorene as the acceptor, is presented with a maximum external quantum efficiency of 52% at 530 nm and a power conversion efficiency, measured under AM1.5G, 100 mW/cm(2) conditions, of 1.5% on an active area of 0.36 cm(2). (c) 2006 American Institute of Physics.