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Wei Lin Leong, Gregory C. Welch, Jason Seifter, Jung Hwa Seo, Guillermo C. Bazan and Alan J. Heeger Understanding the Role of Thermal Processing in High Performance Solution Processed Small Molecule Bulk Heterojunction Solar Cells Advanced Energy Materials 3

Article first published online: 18 OCT 2012 | DOI: 10.1002/aenm.201200631

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Two nearly isostructural donor materials and their thermal annealing effect on photovoltaic performance are studied. The higher crystalline nature of molecule 2 was found to have a higher impact on cell performance despite a competing undesired effect at the donor/aluminum cathode interface, contributing to its superior performance to 1 when blended with PC61BM.

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