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Tayebeh Ameri, Jie Min, Ning Li, Florian Machui, Derya Baran, Michael Forster, Kristina J. Schottler, Daniel Dolfen, Ullrich Scherf and Christoph J. Brabec Performance Enhancement of the P3HT/PCBM Solar Cells through NIR Sensitization Using a Small-Bandgap Polymer Advanced Energy Materials 2

Version of Record online: 18 JUN 2012 | DOI: 10.1002/aenm.201200219

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A smart strategy to significantly improve the energy conversion efficiency of the wide-bandgap polymer P3HT blended in PCBM is demonstrated through NIR sensitization with a low-bandgap polymer. An efficiency of over 4% is achieved by adding 30–40% of the low bandgap polymer Si-PCPDTBT to the binary P3HT:PCBM blend, corresponding to an efficiency improvement of 25% compared to the P3HT:PCBM reference binary blend.

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