Efficient polymer solar cells based on a low bandgap semi-crystalline DPP polymer-PCBM blends.

Liu, Feng; Gu, Yu; Wang, Cheng; Zhao, Wei; Chen, Dian; Briseno, Alejandro L; Russell, Thomas P · Adv Mater · 2012

basic_science · Level V

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Abstract

Solar cell performance and morphology characterization of a diketopyrrolopyrrole-based low bandgap polymer is reported. The polymer adopts an H-type aggregation and solvent mixture processing gives a better morphology. The morphology evolution is characterized by combined GIXD and GISAXS experiments and a four step morphology development mechanism is proposed.

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