Photovoltaics-polymers-side groups

Attaching perylene moieties as side groups allows achievement of high concentration without affecting the electronic structure of the polymer backbone. Putting 16% perylene moieties as side chains predictably results in more efficient energy transfer, observed with polymer 360, both in solution and solid state (emission band at 599 nm). Although no PLED device with 360 has been reported, this material showed excellent performance in solar cells (external photovoltaic QE = 7%, in blend with PPV) [434]. 

In 1995, Heeger and eo vorkers introduced the bulk-heterojunction (BHJ) structure by simply blending polymer and fullerene as active materials, whieh is considered the best PSC device architecture. The extensive studies of donor polymer photovoltaic materials have been well discussed and reviewed.Although thousands of donor polymers with different backbones and side groups have been developed, synthesized and applied in PSCs, donor polymers ean be roughly classified into two types according to their struetures, namely the elassical and novel donor polymers. 

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