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Feng Liu, Yu Gu, Cheng Wang, Wei Zhao, Dian Chen, Alejandro L. Briseno and Thomas P. Russell Efficient Polymer Solar Cells Based on a Low Bandgap Semi-crystalline DPP Polymer-PCBM Blends Advanced Materials 24

Version of Record online: 12 JUN 2012 | DOI: 10.1002/adma.201200902

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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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